gfx: Change types of coordinate and size variables and parameters from int to int32
gfx: Change types of coordinate and size variables and parameters from int to int32

Signed-off-by: Lilis Iskandar <f9acb790f2c75b127492316321ece0121b8eed9b@veand.co>

veandco/go-sdl2,veandco/go-sdl2