libavcodec/h264.c:1084: error: Uninitialized Value
  The value read from ref[_] was never initialized.

libavcodec/h264.c:1084:24: 
1082.                    && (   (l1ref0[xy8] == 0 && FFABS(l1mv0[xy4][0]) <= 1 && FFABS(l1mv0[xy4][1]) <= 1)
1083.                        || (l1ref0[xy8]  < 0 && l1ref1[xy8] == 0 && FFABS(l1mv1[xy4][0]) <= 1 && FFABS(l1mv1[xy4][1]) <= 1))){
1084.                     if(ref[0] > 0)
                             ^
1085.                         a= pack16to32(mv[0][0],mv[0][1]);
1086.                     if(ref[1] > 0)
