libavcodec/motion_est_template.c:794: error: Uninitialized Value
  The value read from ymin was never initialized.

libavcodec/motion_est_template.c:794:11: 
792.     chroma_cmpf= s->dsp.me_cmp[size+1];
793. 
794.     for(y=FFMAX(-dia_size, ymin); y<=FFMIN(dia_size,ymax); y++){
               ^
795.         for(x=FFMAX(-dia_size, xmin); x<=FFMIN(dia_size,xmax); x++){
796.             CHECK_MV(x, y);
