libavcodec/h264.c:1138: error: Uninitialized Value
  The value read from ref[_] was never initialized.

libavcodec/h264.c:1138:32: 
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)
                                     ^
1139.                                 fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1140.                         }
