From 030d85d59a256590290b89306730c53b3f46e120 Mon Sep 17 00:00:00 2001
From: Ran Halprin <rangit@neko.co.il>
Date: Mon, 21 May 2018 11:31:16 -0700
Subject: [PATCH] Do not fail if url is undefined

---
 base/shared/annotation.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/base/shared/annotation.js b/base/shared/annotation.js
index f7a23a6d..01830797 100755
--- a/base/shared/annotation.js
+++ b/base/shared/annotation.js
@@ -667,7 +667,7 @@ var LinkAnnotation = (function LinkAnnotationClosure() {
 
   // Lets URLs beginning with 'www.' default to using the 'http://' protocol.
   function addDefaultProtocolToUrl(url) {
-    if (url.indexOf('www.') === 0) {
+    if (url && url.indexOf('www.') === 0) {
       return ('http://' + url);
     }
     return url;