From 0c52e0c910871bc5855ea8718852005df147465a Mon Sep 17 00:00:00 2001
From: Alan Knowles <alan@roojs.com>
Date: Tue, 23 Dec 2014 17:19:29 +0800
Subject: [PATCH] DataObjects/Core_email.php

---
 DataObjects/Core_email.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/DataObjects/Core_email.php b/DataObjects/Core_email.php
index 0241331a..fb314c6b 100644
--- a/DataObjects/Core_email.php
+++ b/DataObjects/Core_email.php
@@ -242,7 +242,9 @@ class Pman_Core_DataObjects_Core_email extends DB_DataObject
             $element->setAttribute('height', '1');
 
             $html = $doc->getElementsByTagName('html');
-            $html->item(0)->appendChild($element);
+            if ($html->length) {
+                $html->item(0)->appendChild($element);
+            }
             
             $this->plaintext = str_replace("{unsubscribe_link}", $unsubscribe, $this->plaintext);
         }
-- 
2.39.2