libavcodec/motion_est_template.c:754: error: Uninitialized Value
  The value read from ymin was never initialized.

libavcodec/motion_est_template.c:754:9: 
752.     y= best[1];
753.     for(x2=FFMAX(x-dia_size+1, xmin); x2<=FFMIN(x+dia_size-1,xmax); x2+=2){
754.         CHECK_MV(x2, y);
             ^
755.     }
756.     for(y2=FFMAX(y-dia_size/2+1, ymin); y2<=FFMIN(y+dia_size/2-1,ymax); y2+=2){
