Avoid a type mismatch that shows up in C++11.
Taken from <https://bugs.debian.org/853560>.

--- a/src/rtphint.cpp	2012-05-20 16:11:53.000000000 -0600
+++ b/src/rtphint.cpp	2017-05-16 10:25:26.930705191 -0600
@@ -339,7 +339,7 @@
                 pSlash = strchr(pSlash, '/');
                 if (pSlash != NULL) {
                     pSlash++;
-                    if (pSlash != '\0') {
+                    if (*pSlash != '\0') {
                         length = (uint32_t)strlen(pRtpMap) - (pSlash - pRtpMap);
                         *ppEncodingParams = (char *)MP4Calloc(length + 1);
                         strncpy(*ppEncodingParams, pSlash, length);
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<tr><td><span title='2023-03-19 10:57:00 +0100'>2023-03-19</span></td><td><a href='/guix/commit/gnu/packages/patches/python-pillow-CVE-2022-45199.patch?id=c16add7fd9783db46bb5b308a885af62f0299e61'>gnu: python-pillow: Fix CVE-2022-45199.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes: &lt;https://issues.guix.gnu.org/issue/61172&gt;

* gnu/packages/python-xyz.scm (python-pillow/security-fixes): New variable.
(python-pillow): Add replacement.
* gnu/packages/patches/python-pillow-CVE-2022-45199.patch: New file.
* gnu/local.mk: Register it.
</span></span></td><td>Lars-Dominik Braun</td></tr>