avcodec/microdvddec: support various broken form of color tags

Inspired by a patch from Michal Wazgird <mplayer@cyryl.net>

See https://lists.mplayerhq.hu/pipermail/mplayer-dev-eng/2014-November/072772.html

libavcodec/microdvddec.c

@@ -101,7 +101,7 @@ static char *microdvd_load_tags(struct microdvd_tag *tags, char *s)
         case 'C':
             tag.persistent = MICRODVD_PERSISTENT_ON;
         case 'c':
-            if (*s == '$')
+            while (*s == '$' || *s == '#')
                 s++;
             tag.data1 = strtol(s, &s, 16) & 0x00ffffff;
             if (*s != '}')