[Mac] OS X Fullscreen fix.

[Ronald_Reagan]

Uploaded a new version (same url: http://pbclan.net/downloads/assaultcube_...eenfix.dmg ). This time start up the game, make sure gamma is at 100. If you are getting the weird colors error, restart the game. Now play around with the /extraambient value. This is a 0-100 (0 default) variable that adds some ambient light to the map. This should help with some visibility.