on destroy() of a WFS feature, remove its marker

git-svn-id: http://svn.openlayers.org/trunk/openlayers@527 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Feature/WFS.js

@@ -24,6 +24,13 @@ OpenLayers.Feature.WFS.prototype =
             this.layer.addMarker(this.marker);
         }
     },
+    
+    destroy: function() {
+        if (this.marker != null) {
+            this.layer.removeMarker(this.marker);  
+        }
+        OpenLayers.Feature.prototype.destroy.apply(this, arguments);
+    },
 
     /**
      * @param {XMLNode} xmlNode