cleaned up some ivar accesses
cleaned up some ivar accesses

victoraliss0n/geofire-objc,victoraliss0n/geofire-objc,ObjSal/geofire-objc,firebase/geofire-objc,ObjSal/geofire-objc,firebase/geofire-objc,firebase/geofire-objc,ObjSal/geofire-objc,victoraliss0n/geofire-objc,firebase/geofire-objc