avutil/avstring: fix hardcoded separator in av_match_list()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavutil/avstring.c

@@ -409,13 +409,13 @@ int av_match_list(const char *name, const char *list, char separator)
     for (p = name; p && *p; ) {
         for (q = list; q && *q; ) {
             int k;
-            for (k = 0; p[k] == q[k] || (p[k]*q[k] == 0 && p[k]+q[k] == ','); k++)
-                if (k && (!p[k] || p[k] == ','))
+            for (k = 0; p[k] == q[k] || (p[k]*q[k] == 0 && p[k]+q[k] == separator); k++)
+                if (k && (!p[k] || p[k] == separator))
                     return 1;
-            q = strchr(q, ',');
+            q = strchr(q, separator);
             q += !!q;
         }
-        p = strchr(p, ',');
+        p = strchr(p, separator);
         p += !!p;
     }