add inflate() function on marker

git-svn-id: http://svn.openlayers.org/trunk/openlayers@466 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Marker.js

@@ -50,6 +50,17 @@ OpenLayers.Marker.prototype = {
         }            
     },
 
+    /**
+     * @param {float} inflate
+     */
+    inflate: function(inflate) {
+        if (this.icon) {
+            var newSize = new OpenLayers.Size(this.icon.size.w * inflate,
+                                              this.icon.size.h * inflate);
+            this.icon.setSize(newSize);
+        }        
+    },
+    
     /** @final @type String */
     CLASS_NAME: "OpenLayers.Marker"
 };