bugfix

Check if methods getShared and setShared exist

Author: vash15

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "backbone.viewstack",
-  "version": "0.0.1",
+  "version": "0.0.3",
   "homepage": "https://github.com/vash15/backbone.viewstack",
   "authors": [
     "Michele Belluco <michele@belluco.info>"

lib/viewstack.js

@@ -121,8 +121,8 @@ var ViewStack = module.exports = BackBone.View.extend({
 	// refresh
 	// Aggiorna l'url se la view corrette ce l'ha settata
 	refreshUrl: function refreshUrl(){
-		var shared = this.getShared();
-		if ( typeof shared !== "undefined" && this._current && this._current.url ){
+		var shared = this.getShared ? this.getShared() : null;
+		if ( typeof shared !== "undefined" && shared && this._current && this._current.url ){
 			shared.app.navigate(_.result(this._current, 'url'));
 		}	
 		return this;
@@ -172,7 +172,8 @@ ViewStack.middleware = function middleware(options){
 	return function(shared, next){
 		var viewStack = new ViewStack(options);
 		viewStack.clearStack(); // Pulisco dalle eventuali view appese
-		viewStack.setShared( shared ); // setto lo shared object
+		if ( viewStack.setShared )
+			viewStack.setShared( shared ); // setto lo shared object
 		viewStack.render(); // Renderizzo la view base application
 		shared.viewstack = viewStack;
 		next();