mov: Force the full parsing of mp3

Some muxer might or might not fit incomplete mp3 frames in
their packets.

Bug-Id: 899

CC: libav-stable@libav.org
Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>

libavformat/mov.c

@@ -2533,6 +2533,9 @@ static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
         st->codec->width = 0; /* let decoder init width/height */
         st->codec->height= 0;
         break;
+    case AV_CODEC_ID_MP3:
+        st->need_parsing = AVSTREAM_PARSE_FULL;
+        break;
     }
 
     /* Do not need those anymore. */