Retroquad 0.18.5 Released (Patreon)

Fixed an issue with the dynamic resolution not filling up the whole screen sometimes, and fixing this allowed me to clean up quite a bunch of code.

I've also removed the edge caching code entirely (and the r_edgecache cvar), since its performance gains were negligible and it glitched out with some BSP files.

Also fixed a crash with null models during map startup; now the engine will exit to the console and display an error message instead of doing a hard crash.