libavcodec/h264.c:1136: error: Uninitialized Value
  The value read from ref[_] was never initialized.

libavcodec/h264.c:1136:32: 
1134.                         const int16_t *mv_col = l1mv[x8*3 + y8*3*h->b_stride];
1135.                         if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
1136.                             if(ref[0] == 0)
                                     ^
1137.                                 fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1138.                             if(ref[1] == 0)
