libavcodec/h264_mb_template.c:304: error: Uninitialized Value
  The value read from dest[_] was never initialized.

libavcodec/h264_mb_template.c:304:17: 
302.         if (mb_y & 1) // FIXME move out of this function?
303.             for (p = 0; p < 3; p++)
304.                 dest[p] -= h->linesize * 15;
                     ^
305.         if (FRAME_MBAFF(h)) {
306.             int list;
