Gamma adjustment in SDL-GL mode

[Seth Kingsley]

I can't seem to get the gamma adjustment working properly with
SDL/OpenGL rendering.  Setting gl_state.hwgamma to true in
GLimp_InitGraphics() seems like the right fix, but has no effect on the
game itself, only the menus and splash graphics.  I would be using GLX
mode, but it has problems with keys sticking (yet another bug?).

My environment is:

Quake2 CVS version with full game CD.
FreeBSD-5.0-CURRENT
Athlon 1.0 GHz
NVIDIA GeForce 2 MX 400
XFree86-4.2.0

-- 
|| Seth Kingsley || sethk at meowfishies.com ||
|| http://www.meowfishies.com/ | Meow ^_^ ||
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