Added balancing of stack size on entry/exit from rendering nested camera.
Added balancing of stack size on entry/exit from rendering nested camera.


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