fix hint and gl2 build. NOTE: this does not change that GL2 segfaults right away. that is an issue that dates back at least 50 commits, but most likely even back to the webgl merge. I guess nobody actually tried to run hedgewars in GL2 since back then :P

RAR: cleaning up a bit of the IFDEF-clusterf*ck

Fallback to old heuristic if not pit position

update viewlimits after screen/window resize

Allow barrels to spawn in U-shaped pits in stable position

whoops, forgot to include this file in commt

superminor tweaks