From 51267670bc0fd8d54aae4cba582f500324c84156 Mon Sep 17 00:00:00 2001
From: Marcel Werk <burntime@woltlab.com>
Date: Tue, 23 Aug 2016 20:31:58 +0200
Subject: [PATCH] Fixed js error in deleted/collapsed messages

---
 wcfsetup/install/files/js/WoltLabSuite/Core/Ui/Mobile.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/wcfsetup/install/files/js/WoltLabSuite/Core/Ui/Mobile.js b/wcfsetup/install/files/js/WoltLabSuite/Core/Ui/Mobile.js
index f29cc392a0..ef2aa24011 100644
--- a/wcfsetup/install/files/js/WoltLabSuite/Core/Ui/Mobile.js
+++ b/wcfsetup/install/files/js/WoltLabSuite/Core/Ui/Mobile.js
@@ -167,7 +167,8 @@ define(
 							navigation.classList.toggle('open');
 						}
 					});
-					
+				}
+				if (navigation) {
 					navigation.addEventListener(WCF_CLICK_EVENT, function(event) {
 						event.stopPropagation();
 					});
-- 
2.20.1