Fix CVE-2016-5296: Heap-buffer-overflow WRITE in rasterize_edges_1
Adapted for upstream pixman based on:

  https://hg.mozilla.org/releases/mozilla-esr45/rev/5e39c1c2fded

--- pixman-0.34.0/pixman/pixman-edge-imp.h.orig	2015-06-30 05:48:31.000000000 -0400
+++ pixman-0.34.0/pixman/pixman-edge-imp.h	2016-11-16 01:09:34.046335106 -0500
@@ -55,8 +55,9 @@
 	 *
 	 * (The AA case does a similar  adjustment in RENDER_SAMPLES_X)
 	 */
-	lx += X_FRAC_FIRST(1) - pixman_fixed_e;
-	rx += X_FRAC_FIRST(1) - pixman_fixed_e;
+	/* we cast to unsigned to get defined behaviour for overflow */
+	lx = (unsigned)lx + X_FRAC_FIRST(1) - pixman_fixed_e;
+	rx = (unsigned)rx + X_FRAC_FIRST(1) - pixman_fixed_e;
 #endif
 	/* clip X */
 	if (lx < 0)
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<div class='path'>path: <a href='/guix/log/?id=d8661f52b1b9fcc26d4a4705e61dca4ac88f5463'>root</a>/<a href='/guix/log/gnu?id=d8661f52b1b9fcc26d4a4705e61dca4ac88f5463'>gnu</a>/<a href='/guix/log/gnu/services?id=d8661f52b1b9fcc26d4a4705e61dca4ac88f5463'>services</a>/<a href='/guix/log/gnu/services/audio.scm?id=d8661f52b1b9fcc26d4a4705e61dca4ac88f5463'>audio.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/services/audio.scm?id=d8661f52b1b9fcc26d4a4705e61dca4ac88f5463&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2017-08-31 14:43:26 +0200'>2017-08-31</span></td><td><a href='/guix/commit/gnu/services/audio.scm?id=b6dc69af1de806e8b3a70e9a1afe0e1590da5480'>services: mpd: Remove the mpd-file field.</a><span class='msg-avail'>...<span class='msg-tooltip'>Since MPD switches user, the pid-file must be in a writable dir.  This
is now always /var/run/mpd/(user)/pid.

* gnu/services/audio.scm (mpd-service-type): Add a activation-service
extension.
(&lt;mpd-configuration&gt;)[pid-file]: Remove.
(mpd-service): Rename to...
(mpd-shepherd-service): ... this.
(mpd-file-name, mpd-service-activation): New procedure.
* doc/guix.texi (Audio Services): Document the changes.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Peter Mikkelsen</td></tr>
<tr><td><span title='2017-08-13 07:36:32 +0100'>2017-08-13</span></td><td><a href='/guix/commit/gnu/services/audio.scm?id=06465d2ba4291eb2046c90c3977a295a9b7c434b'>gnu: Add mpd service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* doc/guix.texi: Add documentation.
* gnu/services/audio.scm (&lt;mpd-configuration&gt;): New record type.
  (mpd-service-type): New service type.
* gnu/tests/audio.scm: New file.
* gnu/local.mk: Add new files.

Signed-off-by: Christopher Baines &lt;mail@cbaines.net&gt;
</span></span></td><td>Peter Mikkelsen</td></tr>
p'>* gnu/installer/tests.scm (choose-partitioning): Use 'find' to select
the disk.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-03-26 11:53:50 +0100'>2020-03-26</span></td><td><a href='/guix/commit/gnu/installer/tests.scm?id=7a1a10dbd4ef2989ea1cac111849a36c567430e3'>installer: tests: Use a filter to select desktop-environments.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/installer/tests.scm (choose-services): Turn desktop-environments list
into a choose-desktop-environment procedure. This way, it is easier to select
all desktop-environments or none, in the same way as choose-network-service?
and choose-network-management-tool? arguments.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2020-03-05 23:40:23 +0100'>2020-03-05</span></td><td><a href='/guix/commit/gnu/installer/tests.scm?id=ccb1a8c437fa40760899ae95f9d3f10ed7c8b41b'>tests: install: Add "gui-installed-os".</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/installer/tests.scm: New file.
* gnu/local.mk (INSTALLER_MODULES): Add it.
* gnu/tests/install.scm (run-install): Add #:gui-test.  Add (gnu
installer tests) to the marionette imported modules.  Honor GUI-TEST.
Check whether SCRIPT is true.
(%root-password, %syslog-conf): New variable.
(operating-system-with-console-syslog, gui-test-program)
(guided-installation-test): New procedures.
(%extra-packages, installation-os-for-gui-tests)
(%test-gui-installed-os): New variable.
</span></span></td><td>Ludovic Courtès</td></tr>