Added a check into osg::Sequence::traverse() against an empty sequence, so that a non existant child is not traversed.
Added a check into osg::Sequence::traverse() against an empty sequence, so
that a non existant child is not traversed.


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