libavcodec/h264_direct.c:387: error: Uninitialized Value
  The value read from ref[_] was never initialized.

libavcodec/h264_direct.c:387:17: 
385.               h->x264_build > 33U))) {
386.             a = b = 0;
387.             if (ref[0] > 0)
                     ^
388.                 a = mv[0];
389.             if (ref[1] > 0)
