Prevent errors caused by unknown media objects

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 efbf8dbf5961bb44d6e4b91d6425cef291b78e50..3fbbcc2ef63c9d67769a8d01b657efe0165f0093 100644 (file)
--- 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;
                                }
                        }