Fix corner case around lines with odd widths
Fix corner case around lines with odd widths

caseyc37/pygame_cffi,GertBurger/pygame_cffi,CTPUG/pygame_cffi,CTPUG/pygame_cffi,caseyc37/pygame_cffi,CTPUG/pygame_cffi,GertBurger/pygame_cffi,GertBurger/pygame_cffi,caseyc37/pygame_cffi,GertBurger/pygame_cffi