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)
b74d61b62111da1e6'/><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=5e2140511c1ad9ccd731438b74d61b62111da1e6'>refs</a><a class='active' href='/guix/log/gnu/packages/patches/libmemcached-build-with-gcc7.patch'>log</a><a href='/guix/tree/gnu/packages/patches/libmemcached-build-with-gcc7.patch?id=5e2140511c1ad9ccd731438b74d61b62111da1e6'>tree</a><a href='/guix/commit/gnu/packages/patches/libmemcached-build-with-gcc7.patch?id=5e2140511c1ad9ccd731438b74d61b62111da1e6'>commit</a><a href='/guix/diff/gnu/packages/patches/libmemcached-build-with-gcc7.patch?id=5e2140511c1ad9ccd731438b74d61b62111da1e6'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/patches/libmemcached-build-with-gcc7.patch'>
<input type='hidden' name='id' value='5e2140511c1ad9ccd731438b74d61b62111da1e6'/><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=5e2140511c1ad9ccd731438b74d61b62111da1e6'>root</a>/<a href='/guix/log/gnu?id=5e2140511c1ad9ccd731438b74d61b62111da1e6'>gnu</a>/<a href='/guix/log/gnu/packages?id=5e2140511c1ad9ccd731438b74d61b62111da1e6'>packages</a>/<a href='/guix/log/gnu/packages/patches?id=5e2140511c1ad9ccd731438b74d61b62111da1e6'>patches</a>/<a href='/guix/log/gnu/packages/patches/libmemcached-build-with-gcc7.patch?id=5e2140511c1ad9ccd731438b74d61b62111da1e6'>libmemcached-build-with-gcc7.patch</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/patches/libmemcached-build-with-gcc7.patch?id=5e2140511c1ad9ccd731438b74d61b62111da1e6&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-01-23 00:06:52 +0100'>2020-01-23</span></td><td><a href='/guix/commit/gnu/packages/patches/libmemcached-build-with-gcc7.patch?id=737a3c12cd25f76e9fb4872e0a7a1ecb61aff131'>gnu: libmemcached: Fix build.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/databases.scm (libmemcached)[source]: Add patch.
* gnu/packages/patches/libmemcached-build-with-gcc7.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>