Added a protected = operator
Added a protected = operator


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