* Minor changes in d_iwad (void is unnecessary in C++, use of earrlen macro).
* ev_specials: renamed some stuff, added some documentation, and fixed all switch pre-ambles to invoke 3DMidTex height checks.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2375 86ba831e-150c-0410-ab35-e06eaae15ed9