From c53a8564c166f3f75615f48fd3964ca5b4781aa0 Mon Sep 17 00:00:00 2001
From: Dennis Karpienski <dennis@karpienski.de>
Date: Tue, 12 Apr 2016 17:21:20 +0200
Subject: [PATCH] check for attribute

---
 src/more-infos/more-info-media_player.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/more-infos/more-info-media_player.js b/src/more-infos/more-info-media_player.js
index 2292fb43e0..1dbfebc64e 100644
--- a/src/more-infos/more-info-media_player.js
+++ b/src/more-infos/more-info-media_player.js
@@ -108,7 +108,7 @@ export default new Polymer({
       this.volumeSliderValue = newVal.attributes.volume_level * 100;
       this.isMuted = newVal.attributes.is_volume_muted;
       this.source = newVal.attributes.source;
-      this.sourceIndex = newVal.attributes.source_list.indexOf(this.source);
+      this.sourceIndex = newVal.attributes.source_list === undefined ? 0 : newVal.attributes.source_list.indexOf(this.source);
       this.supportsPause = (newVal.attributes.supported_media_commands & 1) !== 0;
       this.supportsVolumeSet = (newVal.attributes.supported_media_commands & 4) !== 0;
       this.supportsVolumeMute = (newVal.attributes.supported_media_commands & 8) !== 0;
@@ -177,6 +177,7 @@ export default new Polymer({
   handleSourceChanged(sourceIndex) {
     // Selected Option will transition to '' before transitioning to new value
     if (!this.stateObj
+        || this.stateObj.attributes.source_list === undefined
         || sourceIndex < 0
         || sourceIndex >= this.stateObj.attributes.source_list.length
     ) {