Fixed issue where the viewport's width and/or height could be off by 1 pixel
Fixed issue where the viewport's width and/or height could be off by 1 pixel

Signed-off-by: Stefan Schindler <eb0877843acc39f8ef6f7269937dee931c372d23@boxbox.org>

Polyfructol/Fire,Polyfructol/Fire,Polyfructol/Fire,Polyfructol/Fire