From 6f431df9108bf087a574f3f2a8e56920b0c75d2f Mon Sep 17 00:00:00 2001
From: Valera Rozuvan <valera@edx.org>
Date: Wed, 7 Aug 2013 14:33:44 +0300
Subject: [PATCH] Fixed bug dealing with empty subtitles Url string.

Now when subs parameter is empty or the YouTube IDs are not specified,
captions will not try to fetch non-existent file.
---
 .../lib/xmodule/xmodule/js/src/videoalpha/09_video_caption.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/common/lib/xmodule/xmodule/js/src/videoalpha/09_video_caption.js b/common/lib/xmodule/xmodule/js/src/videoalpha/09_video_caption.js
index 4210d927a2..b8bc432a1b 100644
--- a/common/lib/xmodule/xmodule/js/src/videoalpha/09_video_caption.js
+++ b/common/lib/xmodule/xmodule/js/src/videoalpha/09_video_caption.js
@@ -123,6 +123,10 @@ function () {
 
         this.videoCaption.hideCaptions(this.hide_captions);
 
+        if (!this.youtubeId('1.0')) {
+            return;
+        }
+
         $.ajaxWithPrefix({
             url: _this.videoCaption.captionURL(),
             notifyOnError: false,