Option to switch off aspect correction (to get properly rounded compass in Catacomb 3-D)

Suggested by Gudadantza:
Option for properly rounded compass in he first game like in the original DOS version when you run it not aspect corrected.
Now in the port, when running in 16:9, the compass is shown oval like in an aspect corrected 4:3 in DOS
https://www.gog.com/forum/catacombs_pack/catacombs_gl_source_port/post27