Merge pull request #125 from ctayl/patch-2

add guard to onReceivedMessage

Author: hariszupcevic

widget/index.html

@@ -598,7 +598,7 @@
     });
 
     buildfire.messaging.onReceivedMessage = function (event) {
-        if (event) {
+        if (event && event.message) {
             var plugin = event.message.data;
             switch (event.name) {
                 case 'OPEN_PLUGIN':
@@ -1480,4 +1480,4 @@
 <link href="glyphicons.css" rel="stylesheet"/>
 <!-- endbuild -->
 </body>
-</html>
+</html>