libavcodec/mpegvideo.c:619: error: Uninitialized Value
  The value read from mv_table_size was never initialized.

libavcodec/mpegvideo.c:619:25: 
617.                 for(j=0; j<2; j++){
618.                     for(k=0; k<2; k++){
619.                         FF_ALLOCZ_OR_GOTO(s->avctx,    s->b_field_mv_table_base[i][j][k], mv_table_size * 2 * sizeof(int16_t), fail)
                             ^
620.                         s->b_field_mv_table[i][j][k] = s->b_field_mv_table_base[i][j][k] + s->mb_stride + 1;
621.                     }
