Pullups for 2.3:

svn merge svn.openlayers.org/trunk/openlayers/@2230 svn.openlayers.org/trunk/openlayers/@2233 svn.openlayers.org/branches/openlayers/2.3/
#480   Grid funkiness
#491   improper URL encoding of LAYERS list in WMS GetMap request
#500   layer.destroy() should remove itself from the map but not set new baselayer


git-svn-id: http://svn.openlayers.org/branches/openlayers/2.3@2234 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer.js

@@ -137,10 +137,17 @@ OpenLayers.Layer.prototype = {
     /**
      * Destroy is a destructor: this is to alleviate cyclic references which
      * the Javascript garbage cleaner can not take care of on its own.
+     * 
+     * @param {Boolean} setNewBaseLayer Should a new baselayer be selected when
+     *                                  this has been removed?
+     *                                  Default is true
      */
-    destroy: function() {
+    destroy: function(setNewBaseLayer) {
+        if (setNewBaseLayer == null) {
+            setNewBaseLayer = true;
+        }
         if (this.map != null) {
-            this.map.removeLayer(this);
+            this.map.removeLayer(this, setNewBaseLayer);
         }
         this.map = null;
         this.name = null;