fixed .popup promise for cache usage

Author: william26

bower.json

@@ -1,6 +1,6 @@
 {
     "name": "oauth-js",
-    "version": "0.2.0",
+    "version": "0.2.1",
     "main": "dist/oauth.min.js",
     "description": "OAuth that just works",
     "license": "apache2",

coffee/lib/oauth.coffee

@@ -156,7 +156,7 @@ module.exports = (window, document, jQuery, navigator) ->
 							if callback
 								return callback(null, res)
 							else
-								return
+								return defer.promise()
 					unless opts.state
 						opts.state = sha1.create_hash()
 						opts.state_type = "client"

dist/oauth.js

@@ -2,7 +2,7 @@
 module.exports = {
   oauthd_url: "https://oauth.io",
   oauthd_api: "https://oauth.io/api",
-  version: "web-0.2.0",
+  version: "web-0.2.1",
   options: {}
 };
 
@@ -197,7 +197,7 @@ module.exports = function(window, document, jQuery, navigator) {
               if (callback) {
                 return callback(null, res);
               } else {
-                return;
+                return defer.promise();
               }
             }
           }