as universally approved on discussions on dev list, replace new Array() with []. all tests pass ff & ie6

git-svn-id: http://svn.openlayers.org/trunk/openlayers@3815 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Map.js

@@ -341,7 +341,7 @@ OpenLayers.Map = OpenLayers.Class({
             this.addControlToMap(this.controls[i]);
         }
 
-        this.popups = new Array();
+        this.popups = [];
 
         this.unloadDestroy = this.destroy.bind(this);