Added checked against an empty _kdNodes list before commensing with intersection
Added checked against an empty _kdNodes list before commensing with intersection


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