on destroy(), go through and destroy() all of the features we have created.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@544 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/Text.js

@@ -31,6 +31,14 @@ OpenLayers.Layer.Text.prototype =
           { method: 'get', onComplete:this.parseData.bind(this) } );
     },
 
+    /**
+     * 
+     */
+    destroy: function() {
+        this.clearFeatures();
+        this.features = null;
+        OpenLayers.Layer.Markers.prototype.destroy.apply(this, arguments);
+    },
 
     /**
      * @param {?} ajaxRequest
@@ -133,6 +141,18 @@ OpenLayers.Layer.Text.prototype =
         Event.stop(evt);
     },
 
+    /**
+     * 
+     */
+    clearFeatures: function() {
+        if (this.features != null) {
+            while(this.features.length > 0) {
+                var feature = this.features[0];
+                this.features.remove(feature);
+                feature.destroy();
+            }
+        }        
+    },
     
     /** @final @type String */
     CLASS_NAME: "OpenLayers.Text"