Wrong colormap with 8 bit Carmack and HQ resize modes

[drfrag]

You get wrong colors when HQ texture resize modes are enabled for 8 bit carmack on polybackend. From another report:

when selecting texture resize modes in the git version on the OPTVAL_SOFTPOLY backend, using the 8-bit Carmack renderer (vid_rendermode 0): Take a look. The colormap offset and stretching seem to vary depending on the algorithm and scaling level selected, too: the previous screenshot was xBRZ 6x; Here's xBRZ 2x, and hqNx 4x.

https://i.imgur.com/ZnamK3r.png
https://i.imgur.com/lyAhW2J.png
https://i.imgur.com/un7Y9ZQ.png

[drfrag]

It's gone.