Fix OpenGL 2.1 devices that support everything we need. The only two devices that do this are Mesa software rasterizer and Intel Ironlake(With a few hacks). Basically since it doesn't support OpenGL 3.0, it can't grab the version the new way. So failing that, it sets to GL 2.1, and continues. Further along, on Ironlake at least, it tries grabbing the extensions the new GL 3.0 way and fails. So have a fallback that grabs the extensions string the old way, in probably the most elegant way possible.