SDL fullscreen no longer stretching by default.

[electrosys]

@anon914446

I guess one of my questions to you since I don’t have a Windows machine is this:
On Windows, If you draw a rectangle the size that you expect the screen to be, does it outline the screen correctly in fullscreen mode? Are you instead getting extra pixels or missing some that you weren’t expecting (like Wayland and the above code)?

When running in windows with my modification the rect is visible on the edge of both windowed and fullscreen, likely because the window is 1280 x 720 and the screen is 1920 x 1080, same ratio. I suspect this would have also been true before the slight modification as well.