[0.9.17] Berserker makes screen blinding red

[Ixnatifual]

When I get the berserk powerup in OpenGL mode my screen becomes so red its very hard to make out anything.

http://img145.imageshack.us/my.php?imag ... 0027fh.png

I think it's the area's general darkness combined with the berserk glow that makes it completely impossible to see anything. You can see well enough in the darkness, and you can see well enough with the berserk in a normally lit area. But unless you're in software mode you can't see much of anything if you get the berserk in the dark area.

ATI RADEON x850

[Graf Zahl]

Since ZDoom already changed the incorrect formula I just reduced the opacity for now. I'll fix this for good once I know the exact values.