Removed GL header as it's already included via the ${OPENSCENEGRAPH_OPENGL_HEADER} entry.
Removed GL header as it's already included via the ${OPENSCENEGRAPH_OPENGL_HEADER} entry.


git-svn-id: aa838dfc23441284dd616281de4245daec5d2135@14532 16af8721-9629-0410-8352-f15c8da7e697

koshman86/osg,artoolkit/osg,XiaoCC/osg,ghub/osg,omega-hub/osg,ghub/osg,omega-hub/osg,ntoand/osg,XiaoCC/osg,XiaoCC/osg,koshman86/osg,artoolkit/osg,koshman86/osg,omega-hub/osg,omega-hub/osg,koshman86/osg,ntoand/osg,XiaoCC/osg,ntoand/osg,ghub/osg,artoolkit/osg,XiaoCC/osg,artoolkit/osg,ghub/osg,ntoand/osg