From c59de414f2d6a73459f8fefaf0a3cad7934ffe17 Mon Sep 17 00:00:00 2001
From: noface <noface@outlook.com>
Date: Sun, 27 Nov 2016 01:04:47 +0100
Subject: [PATCH] Return unless preview exists.

---
 src/Linkification/Embedding.coffee | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Linkification/Embedding.coffee b/src/Linkification/Embedding.coffee
index 37c79b9b3..4a03b8bbf 100644
--- a/src/Linkification/Embedding.coffee
+++ b/src/Linkification/Embedding.coffee
@@ -122,7 +122,7 @@ Embedding =
 
   preview: (data) ->
     {key, uid, link} = data
-    service = Embedding.types[key].preview
+    return if not (service = Embedding.types[key].preview)
     $.on link, 'mouseover', (e) ->
       src = service uid
       el = $.el 'img',