From 7ee88c45de8e0186cedcc644abbb5c73c2c6024b Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Tue, 22 Jan 2019 18:01:28 +0100
Subject: [PATCH] Prevent errors caused by unknown media objects

---
 .../embedded/object/MediaMessageEmbeddedObjectHandler.class.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wcfsetup/install/files/lib/system/message/embedded/object/MediaMessageEmbeddedObjectHandler.class.php b/wcfsetup/install/files/lib/system/message/embedded/object/MediaMessageEmbeddedObjectHandler.class.php
index efbf8dbf59..3fbbcc2ef6 100644
--- a/wcfsetup/install/files/lib/system/message/embedded/object/MediaMessageEmbeddedObjectHandler.class.php
+++ b/wcfsetup/install/files/lib/system/message/embedded/object/MediaMessageEmbeddedObjectHandler.class.php
@@ -46,7 +46,7 @@ class MediaMessageEmbeddedObjectHandler extends AbstractSimpleMessageEmbeddedObj
 		if ($contentLanguageID !== null) {
 			$mediaIDs = [];
 			foreach ($viewableMedia as $media) {
-				if ($media->localizedLanguageID != $contentLanguageID) {
+				if ($media !== null && $media->localizedLanguageID != $contentLanguageID) {
 					$mediaIDs[] = $media->getDecoratedObject()->mediaID;
 				}
 			}
-- 
2.20.1