[r1483] Bug: BRIGHT flag has no effect

[GameFreakDude]

The BRIGHT flag does not function as intended in GZDoom - actors are only rendered at full brightness if the Bright keyword is specified in the current frame, and does not take the BRIGHT flag into account.

This example adds the BRIGHT flag to the ZombieMan and adds the Bright keyword to every frame of the ShotgunGuy. In the software renderer, both actors will appear at full brightness, but in the GL renderer, the ZombieMan will be rendered as if it had no BRIGHT flag.

[Graf Zahl]

I re-fixed the fix because it would have caused problems with brightmaps assigned to fullbright actors.

[GameFreakDude]

Thanks so much!