libavcodec/h264_direct.c:241: error: Uninitialized Value
  The value read from ref[_] was never initialized.

libavcodec/h264_direct.c:241:9: 
239.         }
240.     }
241.     if (ref[0] < 0 && ref[1] < 0) {
             ^
242.         ref[0] = ref[1] = 0;
243.         if (!is_b8x8)
