libavcodec/h264_direct.c:436: error: Uninitialized Value
  The value read from ref[_] was never initialized.

libavcodec/h264_direct.c:436:29: 
434.                             fill_rectangle(&sl->mv_cache[0][scan8[i8 * 4]], 2, 2,
435.                                            8, 0, 4);
436.                         if (ref[1] == 0)
                                 ^
437.                             fill_rectangle(&sl->mv_cache[1][scan8[i8 * 4]], 2, 2,
438.                                            8, 0, 4);
