libavcodec/mpegvideo.c:651: error: Uninitialized Value
  The value read from mb_array_size was never initialized.

libavcodec/mpegvideo.c:651:9: 
649. 
650.         /* which mb is a intra block */
651.         FF_ALLOCZ_OR_GOTO(s->avctx, s->mbintra_table, mb_array_size, fail);
             ^
652.         memset(s->mbintra_table, 1, mb_array_size);
653. 
