Changed the Switch::addChild(Node*) behavior so it doesn't override the any pre-exisitng _values value.
Changed the Switch::addChild(Node*) behavior so it doesn't override the
any pre-exisitng _values value.


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