libavcodec/h264_refs.c:554: error: Uninitialized Value
  The value read from j was never initialized.

libavcodec/h264_refs.c:554:5: 
552. int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count)
553. {
554.     int i, av_uninit(j);
         ^
555.     int current_ref_assigned = 0, err = 0;
556.     Picture *av_uninit(pic);
