libavcodec/motion_est_template.c:635: error: Uninitialized Value
  The value read from ymin was never initialized.

libavcodec/motion_est_template.c:635:11: 
633.     chroma_cmpf = s->mecc.me_cmp[size + 1];
634. 
635.     for(y=FFMAX(-dia_size, ymin); y<=FFMIN(dia_size,ymax); y++){
               ^
636.         for(x=FFMAX(-dia_size, xmin); x<=FFMIN(dia_size,xmax); x++){
637.             CHECK_MV(x, y);
