libavcodec/h264.c:1152: error: Uninitialized Value
  The value read from ref[_] was never initialized.

libavcodec/h264.c:1152:32: 
1150.                         const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
1151.                         if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
1152.                             if(ref[0] == 0)
                                     ^
1153.                                 *(uint32_t*)h->mv_cache[0][scan8[i8*4+i4]] = 0;
1154.                             if(ref[1] == 0)
