update doc for control fallback

Author: tonio

lib/OpenLayers/Map.js

@@ -195,7 +195,7 @@ OpenLayers.Map = OpenLayers.Class({
      * If not provided in the map options at construction, the map will
      *     by default be given the following controls if present in the build:
      *  - <OpenLayers.Control.Navigation> or <OpenLayers.Control.TouchNavigation>
-     *  - <OpenLayers.Control.Zoom>
+     *  - <OpenLayers.Control.Zoom> or <OpenLayers.Control.PanZoom>
      *  - <OpenLayers.Control.ArgParser>
      *  - <OpenLayers.Control.Attribution>
      */