From f43851d743e041cb0a24c9e9ee03b8c73d505aab Mon Sep 17 00:00:00 2001
From: Nicolas Boisselier <nicolas.boisselier@gmail.com>
Date: Tue, 23 Jun 2015 16:02:24 +0100
Subject: [PATCH] db.php

---
 lib/php/db.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/php/db.php b/lib/php/db.php
index f12468fb..73880cd1 100644
--- a/lib/php/db.php
+++ b/lib/php/db.php
@@ -349,7 +349,7 @@ FROM pg_catalog.pg_attribute a WHERE a.attrelid = (SELECT c.oid FROM pg_catalog.
       .'<div class="buttons">'
       .'<input type="submit" />'
       .'<input type="reset" />'
-      .'<input type="button" onclick="document.location=document.referrer" value="Cancel" />'
+      .($_SERVER['HTTP_REFERER'] ? '<input type="button" onclick="document.location=document.referrer" value="Cancel" />' : '')
       .'</div>'
     .PHP_EOL;
 
-- 
2.47.3