Update Layer classes to use new Class.create/inherit functions.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@1649 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/Boxes.js

@@ -10,7 +10,7 @@
  */
 OpenLayers.Layer.Boxes = OpenLayers.Class.create();
 OpenLayers.Layer.Boxes.prototype = 
-    OpenLayers.Util.extend( new OpenLayers.Layer.Markers(), {
+    OpenLayers.Class.inherit( OpenLayers.Layer.Markers, {
 
     initialize: function () {
         OpenLayers.Layer.Markers.prototype.initialize.apply(this, arguments);