Update _XData32 declaration in SDL_x11sym.h to match that of libx11 1.6.

--- SDL-1.2.15/src/video/x11/SDL_x11sym.h.~1~	2012-01-19 01:30:06.000000000 -0500
+++ SDL-1.2.15/src/video/x11/SDL_x11sym.h	2014-12-26 00:22:36.445067694 -0500
@@ -165,7 +165,7 @@
  */
 #ifdef LONG64
 SDL_X11_MODULE(IO_32BIT)
-SDL_X11_SYM(int,_XData32,(Display *dpy,register long *data,unsigned len),(dpy,data,len),return)
+SDL_X11_SYM(int,_XData32,(Display *dpy,register _Xconst long *data,unsigned len),(dpy,data,len),return)
 SDL_X11_SYM(void,_XRead32,(Display *dpy,register long *data,long len),(dpy,data,len),)
 #endif
 
 type='hidden' name='id' value='5cf9137ccb20f12f88bfbb216bb24c6d8262cd1b'/><select name='h' onchange='this.form.submit();'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=5cf9137ccb20f12f88bfbb216bb24c6d8262cd1b'>refs</a><a class='active' href='/guix/log/tests/go.scm'>log</a><a href='/guix/tree/tests/go.scm?id=5cf9137ccb20f12f88bfbb216bb24c6d8262cd1b'>tree</a><a href='/guix/commit/tests/go.scm?id=5cf9137ccb20f12f88bfbb216bb24c6d8262cd1b'>commit</a><a href='/guix/diff/tests/go.scm?id=5cf9137ccb20f12f88bfbb216bb24c6d8262cd1b'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/tests/go.scm'>
<input type='hidden' name='id' value='5cf9137ccb20f12f88bfbb216bb24c6d8262cd1b'/><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=5cf9137ccb20f12f88bfbb216bb24c6d8262cd1b'>root</a>/<a href='/guix/log/tests?id=5cf9137ccb20f12f88bfbb216bb24c6d8262cd1b'>tests</a>/<a href='/guix/log/tests/go.scm?id=5cf9137ccb20f12f88bfbb216bb24c6d8262cd1b'>go.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/tests/go.scm?id=5cf9137ccb20f12f88bfbb216bb24c6d8262cd1b&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-05-05 00:58:04 -0400'>2021-05-05</span></td><td><a href='/guix/commit/tests/go.scm?id=2354d79b88e80b34593dfdeb307ae602e21dcc8a'>tests: go: Remove duplicate go-version-&gt;git-ref test.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-05-04 22:48:27 +0200'>2021-05-04</span></td><td><a href='/guix/commit/tests/go.scm?id=9f0bdfd18668f177a899d489ac39d87f3963f88f'>tests: go: Fix typos in test descriptions.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-04-09 22:41:32 -0400'>2021-04-09</span></td><td><a href='/guix/commit/tests/go.scm?id=a8b927a562aad7e5f77d0e4db2d9cee3434446d2'>import: go: Add an option to use pinned versions.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-04-09 22:41:31 -0400'>2021-04-09</span></td><td><a href='/guix/commit/tests/go.scm?id=6aee902eaf9e38d5f41f568ef787fa0cc5203318'>import: go: Improve synopsis and description parsing.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-03-10 18:01:48 +0100'>2021-03-10</span></td><td><a href='/guix/commit/tests/go.scm?id=d028aef31c9dd05c0390addc3d7f419e41c530ab'>import: go: Compute the hash of Git checkouts.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-03-10 18:01:48 +0100'>2021-03-10</span></td><td><a href='/guix/commit/tests/go.scm?id=02e2e093e858e8a0ca7bd66c1f1f6fd0a1705edb'>import: Add Go importer.</a><span class='msg-avail'>...</span></td><td>Katherine Cox-Buday</td></tr>