Fix the build with gtkmm 4:

https://github.com/transmission/transmission/issues/6392

Patch copied from upstream source repository:

https://github.com/transmission/transmission/commit/e116672b27b314d54514c96b1fa7aef1dee900b1

From e116672b27b314d54514c96b1fa7aef1dee900b1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C5=93ur?= <coeur@gmx.fr>
Date: Sun, 17 Dec 2023 16:37:35 +0100
Subject: [PATCH] fix: build error on  GTKMM-4 (#6393)

---
 gtk/OptionsDialog.cc | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/gtk/OptionsDialog.cc b/gtk/OptionsDialog.cc
index 08198540c10..8c28fc76f98 100644
--- a/gtk/OptionsDialog.cc
+++ b/gtk/OptionsDialog.cc
@@ -338,7 +338,16 @@ void TorrentFileChooserDialog::onOpenDialogResponse(int response, Glib::RefPtr<S
         bool const do_prompt = get_choice(std::string(ShowOptionsDialogChoice)) == "true";
         bool const do_notify = false;
 
-        auto const files = IF_GTKMM4(get_files2, get_files)();
+#if GTKMM_CHECK_VERSION(4, 0, 0)
+        auto files = std::vector<Glib::RefPtr<Gio::File>>();
+        auto files_model = get_files();
+        for (auto i = guint{ 0 }; i < files_model->get_n_items(); ++i)
+        {
+            files.push_back(gtr_ptr_dynamic_cast<Gio::File>(files_model->get_object(i)));
+        }
+#else
+        auto const files = get_files();
+#endif
         g_assert(!files.empty());
 
         /* remember this folder the next time we use this dialog */
/guix/diff/gnu/packages/bison.scm?id=ee0ef0b58ff3ba4b6b2aa81246a50ab9bf020292'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/bison.scm'>
<input type='hidden' name='id' value='ee0ef0b58ff3ba4b6b2aa81246a50ab9bf020292'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=ee0ef0b58ff3ba4b6b2aa81246a50ab9bf020292'>root</a>/<a href='/guix/log/gnu?id=ee0ef0b58ff3ba4b6b2aa81246a50ab9bf020292'>gnu</a>/<a href='/guix/log/gnu/packages?id=ee0ef0b58ff3ba4b6b2aa81246a50ab9bf020292'>packages</a>/<a href='/guix/log/gnu/packages/bison.scm?id=ee0ef0b58ff3ba4b6b2aa81246a50ab9bf020292'>bison.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/bison.scm?id=ee0ef0b58ff3ba4b6b2aa81246a50ab9bf020292&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-12-13 17:48:25 +0100'>2021-12-13</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=8394619baceb118df92e355377fd543bb1aa501a'>gnu: Simplify package inputs.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-05-09 23:43:31 +0200'>2021-05-09</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=280405405796ff9337d44a778eb8f4be24240d6e'>gnu: bison: Update to 3.7.6.</a></td><td>Marius Bakke</td></tr>
<tr><td><span title='2021-01-26 11:27:13 +0200'>2021-01-26</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=fd2588472ec18cafba3a4391d267f9a03e9d2f30'>gnu: bison: Update to 3.7.5.</a></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2020-11-18 15:22:51 +0200'>2020-11-18</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=d545c0cf328ede6afa0d3c0fd29ee62b318cbfea'>gnu: bison: Update to 3.7.4.</a></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2020-08-26 18:35:14 +0200'>2020-08-26</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=17dddeeee560527a8f30d37761949d658056cb09'>Merge remote-tracking branch 'origin/master' into core-updates</a></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2020-07-30 02:53:28 +0200'>2020-07-30</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=8206a282b157fcf2d7435850587bf3ae29319698'>gnu: bison: Mention yacc in the description.</a></td><td>Jakub Kądziołka</td></tr>
<tr><td><span title='2020-06-22 03:35:03 +0200'>2020-06-22</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=eeef77d9d371f4169210ffcca98e3a45ff9ff229'>gnu: bison-3.6: Remove package.</a></td><td>Jakub Kądziołka</td></tr>
<tr><td><span title='2020-06-22 02:56:22 +0200'>2020-06-22</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=43bc7855113bd725d464dd9eaa1e54e78edfaab1'>Merge branch 'master' into core-updates</a></td><td>Jakub Kądziołka</td></tr>
<tr><td><span title='2020-06-22 02:35:55 +0200'>2020-06-22</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=f8a28b6c6d4fe7642b7df35e8518e3c0174ede74'>gnu: bison-3.6: Don't change the name of the package.</a></td><td>Jakub Kądziołka</td></tr>
<tr><td><span title='2020-06-21 11:06:53 +0200'>2020-06-21</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=512d23c65d82bb874ca1fb3c12095b1cec8bbfca'>gnu: Add poke.</a></td><td>B. Wilson</td></tr>
<tr><td><span title='2020-06-21 11:02:52 +0200'>2020-06-21</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=0c4e39c0b025fb23a2e5df46434fc96112bb6d6c'>gnu: bison: Update to 3.6.3.</a></td><td>B. Wilson</td></tr>
<tr><td><span title='2020-03-26 22:35:35 +0100'>2020-03-26</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=8595c7b0bc84b354321ec8f6ccca54322f277eb6'>gnu: bison: Update to 3.5.3.</a></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-02-15 22:02:56 +0100'>2020-02-15</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=62852fa27c8c9825023c3db0afacc532621cb6d1'>gnu: bison: Update to 3.5.2.</a></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-01-24 20:44:37 +0100'>2020-01-24</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=d040e650b2bfeb4ba25912f68f828b675c6b0464'>gnu: bison: Update to 3.5.1.</a></td><td>Marius Bakke</td></tr>
<tr><td><span title='2019-12-16 10:30:36 +0200'>2019-12-16</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=0c25097e8bbf6f25c53106d7e5ba9ba3c5146b1b'>gnu: bison: Update to 3.5.</a></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2019-11-26 22:18:44 +0200'>2019-11-26</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=a0361e09658a728ec4b7f36fba0e9625948b4ea1'>gnu: bison: Update to 3.4.2.</a></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2019-09-30 09:49:34 +0200'>2019-09-30</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=8d564b8b81b98fec9aac2f5f2d3cb0d1f2ea1416'>gnu: xyce: Use Bison 3.0.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-06-17 11:23:44 +0200'>2019-06-17</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=2c35ae82192fd6f1732b15fa41aec87aa61a1879'>gnu: bison: Disable parallel tests, too.</a></td><td>Marius Bakke</td></tr>
<tr><td><span title='2019-06-16 09:39:00 +0200'>2019-06-16</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=b1593c1c4fd8f4fc6df4c43cab51334426e3aa76'>gnu: bison: Disable parallel build.</a></td><td>Marius Bakke</td></tr>
<tr><td><span title='2019-05-25 00:47:53 +0200'>2019-05-25</span></td><td><a href='/guix/commit/gnu/packages/bison.scm?id=e7809d96aa3853e09a90c42d4b5a5dbd84765964'>gnu: bison: Update to 3.4.1.</a></td><td>Marius Bakke</td></tr>