From 6cbe332a3678ce3e394c2f868c8aaa4f6a8bd374 Mon Sep 17 00:00:00 2001
From: Martin Edenhofer <me@edenhofer.de>
Date: Mon, 12 Oct 2015 23:58:59 +0200
Subject: [PATCH] Improved input validation.

---
 .../app/controllers/_ui_element/ticket_selector.coffee          | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/assets/javascripts/app/controllers/_ui_element/ticket_selector.coffee b/app/assets/javascripts/app/controllers/_ui_element/ticket_selector.coffee
index dbb7a695f..388e43a54 100644
--- a/app/assets/javascripts/app/controllers/_ui_element/ticket_selector.coffee
+++ b/app/assets/javascripts/app/controllers/_ui_element/ticket_selector.coffee
@@ -184,7 +184,7 @@ class App.UiElement.ticket_selector
     item = ''
     if config && App.UiElement[config.tag]
       config['name'] = name
-      if attribute.value[groupAndAttribute]
+      if attribute.value && attribute.value[groupAndAttribute]
         config['value'] = _.clone(attribute.value[groupAndAttribute]['value'])
       if 'multiple' of config
         config.multiple = true