Fix probe for mov00003.mqv.

Originally committed as revision 12833 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/mov.c

@@ -1682,6 +1682,7 @@ static int mov_probe(AVProbeData *p)
         case MKTAG( 'f', 't', 'y', 'p' ):
         case MKTAG( 's', 'k', 'i', 'p' ):
         case MKTAG( 'u', 'u', 'i', 'd' ):
+        case MKTAG( 'p', 'r', 'f', 'l' ):
             offset = AV_RB32(p->buf+offset) + offset;
             /* if we only find those cause probedata is too small at least rate them */
             score = AVPROBE_SCORE_MAX - 50;