fix decals again. clampmap should work properly with them, also removed the extra part.
fix rtlight pvs issue with respect to portals
fix vid_reload causing the d3d9 renderer to use nearest sampling
terrain system should now mostly work with d3d9. still has issues.
fix q3 volumetric fog not applying to models
git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@5174 fc73d0e0-1445-4013-8a0c-d673dee63da5
