addTile: don't set the deprecated url param

[fredj]

In OpenLayers.Layer.TileCache.addTile() the url is computed and passed to the OpenLayers.Tile.Image constructor but this parameter is deprecated.

The following patch removes the url computation:

Index: lib/OpenLayers/Layer/TileCache.js
===================================================================
--- lib/OpenLayers/Layer/TileCache.js	(revision 10860)
+++ lib/OpenLayers/Layer/TileCache.js	(working copy)
@@ -157,9 +157,8 @@
      * {<OpenLayers.Tile.Image>} The added <OpenLayers.Tile.Image>
      */
     addTile:function(bounds, position) {
-        var url = this.getURL(bounds);
         return new OpenLayers.Tile.Image(this, position, bounds, 
-                                             url, this.tileSize);
+                                         null, this.tileSize);
     },
     
     CLASS_NAME: "OpenLayers.Layer.TileCache"

Tests still pass, please review.

[fredj]

TileCache and KaMap: don't pass the deprecated url param

[fredj]

replaced by #2904