Summary:
If x is already less than '0', there is no need to check if it is
bigger than pan_max_x. Likewise, if y is already less than '0',
there is no need to check if it is bigger than pan_max_y.
Reviewers: Hermet, cedric, SanghyeonLee, singh.amitesh
Reviewed By: singh.amitesh
Subscribers: seoz, minkyu, sju27, jpeg
Differential Revision: https://phab.enlightenment.org/D3865
Shuhrat Dehkanov
SangHyeon Lee
Cedric BAIL