Added definitation for GL_COMPRESSED_* tokens for case where early OpenGL headers don't provide them.
Added definitation for GL_COMPRESSED_* tokens for case where early OpenGL headers
don't provide them.


jtorresfabra/osg,jtorresfabra/osg,artoolkit/osg,scrawl/osg,marchelbling/osg,tomasthoresen/osg,tomasthoresen/osg,scrawl/osg,openscenegraph/osg,marchelbling/osg,jtorresfabra/osg,marchelbling/osg,scrawl/osg,artoolkit/osg,openscenegraph/osg,artoolkit/osg,tomasthoresen/osg,scrawl/osg,jtorresfabra/osg,openscenegraph/osg,artoolkit/osg,openscenegraph/osg,marchelbling/osg,tomasthoresen/osg