Fixed infinite loop in osgProducer::CameraGroup::advance().
Fixed infinite loop in osgProducer::CameraGroup::advance().


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