libavcodec/motion_est_template.c:632: error: Uninitialized Value
  The value read from ymin was never initialized.

libavcodec/motion_est_template.c:632:13: 
630.             CHECK_MV(x + dia_size - dir, y - dir           );
631.             CHECK_MV(x - dir           , y - dia_size + dir);
632.             CHECK_MV(x - dia_size + dir, y + dir           );
                 ^
633.         }
634. 
