From 0132fa38b0c044fa4c59b52cac8d5792d7627267 Mon Sep 17 00:00:00 2001
From: Seth Call <sethcall@gmail.com>
Date: Sun, 31 Aug 2014 15:23:42 -0500
Subject: [PATCH] * guard against undefined SessionRemoveAllPlayTracks

---
 web/app/assets/javascripts/session.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/web/app/assets/javascripts/session.js b/web/app/assets/javascripts/session.js
index 06d7ab3b2..1bdb38990 100644
--- a/web/app/assets/javascripts/session.js
+++ b/web/app/assets/javascripts/session.js
@@ -1464,7 +1464,10 @@
 
             // make sure no previous plays are still going on by accident
             context.jamClient.SessionStopPlay();
-            context.jamClient.SessionRemoveAllPlayTracks();
+            if(context.jamClient.SessionRemoveAllPlayTracks) {
+              // upgrade guard
+              context.jamClient.SessionRemoveAllPlayTracks();
+            }
         };