Fix skies being shifted down a few pixels compared to Woof 12.0.2

[ceski-1]

Edit: See comment further down.

old information

1. Partially fixes walls being drawn slightly differently: Prevent light scale overflow #1605 (comment)
2. Fixes skies being shifted down a few pixels.

For (1), there are still occasional wall columns that vary slightly. I don't know the cause but it doesn't seem critical at the moment. Here's a zip file with screenshots and a save: woofsav3_shots.zip. Look at the wall in the middle left.

For this PR, I ran a modified version of the HOM test (#1525 (comment)) with the entire range of FOVs and it was fine: hom_with_fov.patch.

[rfomin]

Thanks, works good for me.

For (1), there are still occasional wall columns that vary slightly. I don't know the cause but it doesn't seem critical at the moment.

This is really hard to notice. Due to the nature of Doom's rendering and fixed math, I'm not sure that the rendering can be absolutely perfect at all resolutions.

[ceski-1]

Just to be safe, I tested El Juancho's config with an aspect ratio forced to 3440:1440 and unfortunately the HOM appeared. I don't want to risk regressions for such a small improvement, so I reverted the wall rendering adjustment.