From e9620c977aa230001f3c158f10431f70b32849ab Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Lucas?= <sebastien@slucas.fr>
Date: Fri, 6 Dec 2013 18:39:10 +0100
Subject: [PATCH] Fix a javascript error on Webkit browsers. fix #122

---
 util.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/util.js b/util.js
index 3c5b88d..a99e981 100644
--- a/util.js
+++ b/util.js
@@ -395,6 +395,10 @@ function handleLinks () {
 }
 
 window.onpopstate = function(event) {
+    if (!isDefined (currentData)) {
+        return;
+    }
+
     before = new Date ();
     var data = cache.get (event.state);
     updatePage (data);