libavcodec/h264.c:1147: error: Uninitialized Value
  The value read from ref[_] was never initialized.

libavcodec/h264.c:1147:32: 
1145.                             if(ref[0] == 0)
1146.                                 *(uint32_t*)h->mv_cache[0][scan8[i8*4+i4]] = 0;
1147.                             if(ref[1] == 0)
                                     ^
1148.                                 *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] = 0;
1149.                         }
