qcc: added support for variable arguments via the va_arg intrinsic.
qcc: fix up some comment/whitespace issues with the preprocessor.
random hacks to try to improve dp compatibility a little.
git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@4573 fc73d0e0-1445-4013-8a0c-d673dee63da5