Software renderer bug fixed

[brendanburns at attbi.com]

Hey Guys,
I found and fixed the bug(s) in the software renderer that were causing it to
crash when compiled for q2max...  Anyway, it seems to work for me (haven't
tested it on PPC)  update in CVS and give it a rip.  There may be other problems.

Known Bug:
Crosshairs won't work.

Zakk, we might want to do a new release of the installers since they're probably
broken for software rendering.

I'll look into updating our source base to newer releases of q2max too...

--brendan