Remove incorrect negative sign from previous anaglyph commit
Remove incorrect negative sign from previous anaglyph commit

JohnRThomas/opengl-examples,JohnRThomas/opengl-examples,JohnRThomas/opengl-examples,runewake2/opengl-examples,runewake2/opengl-examples,JohnRThomas/opengl-examples,runewake2/opengl-examples,runewake2/opengl-examples