BGE bugfix/patch "[#26075] game anaglyph colors are inverted" by Juha Maki-Kanto (kanttori)
Later I will try to find when this bug was introduced. But it's definitively broken in trunk.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57646 954f8c5b-7b00-dc11-b283-0030488c597c