From f5528c766f651a2f6b6f812ef53057d73aab9d85 Mon Sep 17 00:00:00 2001
From: Calvin Montgomery <calzoneman@gmail.com>
Date: Tue, 20 May 2014 22:32:26 -0700
Subject: [PATCH] only execute callback if it's not undefined

---
 lib/channel/playlist.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/channel/playlist.js b/lib/channel/playlist.js
index 9077a9d4..476018c9 100644
--- a/lib/channel/playlist.js
+++ b/lib/channel/playlist.js
@@ -1000,7 +1000,9 @@ PlaylistModule.prototype.refreshGoogleDocs = function (cb) {
         if (self.current) {
             self.current.media.meta.object = self.current.media.meta.object || null;
         }
-        cb();
+        if (cb) {
+            cb();
+        }
     };
 
     if (!this.current || this.current.media.type !== "gd") {