From 5da03103a35d1d441648cb98ceba1409ba695696 Mon Sep 17 00:00:00 2001
From: Pierre Ossman <ossman@cendio.se>
Date: Thu, 2 Mar 2017 14:22:15 +0100
Subject: [PATCH] ErrorEvent.error isn't always set

It's not just a matter of the browser lacking support.
---
 app/error-handler.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/error-handler.js b/app/error-handler.js
index ecfb2b0d..1ec75881 100644
--- a/app/error-handler.js
+++ b/app/error-handler.js
@@ -29,7 +29,7 @@
                 msg.appendChild(div);
             }
 
-            if ((err !== undefined) &&
+            if (err &&
                 (err.stack !== undefined)) {
                 div = document.createElement("div");
                 div.className = 'noVNC_stack';