final 64bit qcvm portability issues fixed (I hope).
new qc extension: DP_QC_UNLIMITEDTEMPSTRINGS (assuming pr_tempstringcount = 0)
fixed a couple of issues with msg_entity being random.
git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@2475 fc73d0e0-1445-4013-8a0c-d673dee63da5