void PCZSceneManager::_updatePortalZoneData(void)
	{
		PCZone * zone;
	    ZoneMap::iterator zit = mZones.begin();

	    while ( zit != mZones.end() )
	    {
		    zone = zit->second;
			// this callchecks for portal zone changes & applies zone data changes as necessary
			zone->updatePortalsZoneData(); 
			// proceed to next zone in the list
		    ++zit;
	    }
	}