From Vlad Danciu, fixed leaf depth sort functor
From Vlad Danciu, fixed leaf depth sort functor


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