Fix from Don Tidrow for bug when moving between RenderGraph when popping back up to common parents.
Fix from Don Tidrow for bug when moving between RenderGraph when popping back
up to common parents.


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