From f1636a7a9ea939b693eb39381fcea73cf262e7de Mon Sep 17 00:00:00 2001
From: Paulus Schoutsen <paulus@paulusschoutsen.nl>
Date: Sun, 8 Nov 2015 23:28:10 -0800
Subject: [PATCH] Fix a bug when removing states from UI.

---
 src/components/ha-zone-cards.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/components/ha-zone-cards.js b/src/components/ha-zone-cards.js
index 79c3d8e8d0..4ee13140fe 100644
--- a/src/components/ha-zone-cards.js
+++ b/src/components/ha-zone-cards.js
@@ -128,10 +128,10 @@ export default new Polymer({
   },
 
   computeGroupEntityOfCard(cards, card) {
-    return cards[card].groupEntity;
+    return card in cards && cards[card].groupEntity;
   },
 
   computeStatesOfCard(cards, card) {
-    return cards[card].entities;
+    return card in cards && cards[card].entities;
   },
 });