From 3720e37f06654e942179a31b6e65ed2a5d0fe2a1 Mon Sep 17 00:00:00 2001
From: Mikael Nordfeldth <mmn@hethane.se>
Date: Wed, 13 Jan 2016 14:24:00 +0100
Subject: [PATCH] property attribute could be null in meta tags of course

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

diff --git a/plugins/Oembed/lib/opengraphhelper.php b/plugins/Oembed/lib/opengraphhelper.php
index 07b5cf5d70..4573f5d8ab 100644
--- a/plugins/Oembed/lib/opengraphhelper.php
+++ b/plugins/Oembed/lib/opengraphhelper.php
@@ -34,7 +34,7 @@ class OpenGraphHelper
             }
             $property = $node->attributes->getNamedItem('property');
             $matches = array();
-            if (!preg_match(self::KEY_REGEX, $property->value, $matches)) {
+            if ($property === null || !preg_match(self::KEY_REGEX, $property->value, $matches)) {
                 // not property="og:something"
                 continue;
             }