#662 - prototypes shouldn't get properties that might be extended

git-svn-id: http://svn.openlayers.org/trunk/openlayers@3070 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/DrawFeature.js

@@ -22,7 +22,7 @@ OpenLayers.Control.DrawFeature.prototype =
     /**
      * @type {Object} The functions that are sent to the handler for callback
      */
-    callbacks: {},
+    callbacks: null,
     
     /**
      * @type {Function} Called after each feature is added

lib/OpenLayers/Control/OverviewMap.js

@@ -46,7 +46,7 @@ OpenLayers.Control.OverviewMap.prototype =
      * 
      * @type Array(OpenLayers.Layer)
      */
-    layers: [],
+    layers: null,
 
     /**
      * The ratio of the overview map resolution to the main map resolution
@@ -68,13 +68,14 @@ OpenLayers.Control.OverviewMap.prototype =
      * options that the main map was constructed with.
      * @type: Object
      */
-    mapOptions: {},
+    mapOptions: null,
 
     /**
      * @constructor
      * @param {Object} options Hashtable of options to set on the overview map
      */
     initialize: function(options) {
+        this.layers = new Array();
         OpenLayers.Control.prototype.initialize.apply(this, [options]);
     },
     

lib/OpenLayers/Control/SelectFeature.js

@@ -45,7 +45,7 @@ OpenLayers.Control.SelectFeature.prototype =
     /**
      * @type {Object} The functions that are sent to the handler for callback
      */
-    callbacks: {},
+    callbacks: null,
     
     /**
      * @type {Object} Hash of styles