move addlayer event trigger to after the baselayer has been set

git-svn-id: http://svn.openlayers.org/trunk/openlayers@1619 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Map.js

@@ -281,8 +281,6 @@ OpenLayers.Map.prototype = {
         this.layers.push(layer);
         layer.setMap(this);
 
-        this.events.triggerEvent("addlayer");
-
         //make sure layer draws itself!
         if (this.center != null) {
             var bounds = this.getExtent();
@@ -298,6 +296,8 @@ OpenLayers.Map.prototype = {
                 layer.setVisibility(false);
             }
         }
+
+        this.events.triggerEvent("addlayer");
     },
 
     /**