Allowing layers, center, and zoom to be set in the layer constructor. r=ahocevar (closes #2480)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@10044 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Map.js

@@ -486,6 +486,9 @@ OpenLayers.Map = OpenLayers.Class({
         // now override default options 
         OpenLayers.Util.extend(this, options);
 
+        // initialize layers array
+        this.layers = [];
+
         this.id = OpenLayers.Util.createUniqueID("OpenLayers.Map_");
 
         this.div = OpenLayers.Util.getElement(div);
@@ -564,8 +567,6 @@ OpenLayers.Map = OpenLayers.Class({
                 document.getElementsByTagName('head')[0].appendChild(cssNode);
             }
         }
-
-        this.layers = [];
         
         if (this.controls == null) {
             if (OpenLayers.Control != null) { // running full or lite?
@@ -590,6 +591,17 @@ OpenLayers.Map = OpenLayers.Class({
 
         // always call map.destroy()
         OpenLayers.Event.observe(window, 'unload', this.unloadDestroy);
+        
+        // add any initial layers
+        if (options && options.layers) {
+            this.addLayers(options.layers);
+        }
+        
+        // set center (and optionally zoom)
+        if (options && options.center) {
+            // zoom can be undefined here
+            this.setCenter(options.center, options.zoom);
+        }
     },
     
     /**