integer scaling in fullscreen mode

[ofsaleem]

What feature do you want to get added? And how it will work?

i see this FR exists in https://github.com/snesrev/zelda3/issues/72 but it was closed and doesn't seem to actually be implemented - ctrl+scroll does nothing for me and in fullscreen mode on my 2560x1440 monitor, the entire monitor gets filled, which shouldn't be possible if integer scaling is forced (i'm not using 'extend_y' for the internal 240 vres)