From 96744e1ef5e10a7bcf22803df7180cabdc42989f Mon Sep 17 00:00:00 2001
From: Christopher Baines <cb15g11@soton.ac.uk>
Date: Sun, 10 Aug 2014 10:41:32 +0100
Subject: Don't attempt to switch to undefined levels

---
 src/leaflet-soton.js | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/leaflet-soton.js b/src/leaflet-soton.js
index 799b2a4..1a47ce9 100644
--- a/src/leaflet-soton.js
+++ b/src/leaflet-soton.js
@@ -815,10 +815,12 @@ SELECT * WHERE {\
                 var bounds = L.latLngBounds(coords);
                 this.fitBounds(bounds);
 
-                if (L.Util.isArray(feature.properties.level)) {
-                    this.setLevel(feature.properties.level[0]);
-                } else {
-                    this.setLevel(feature.properties.level);
+                if ("level" in feature.properties) {
+                    if (L.Util.isArray(feature.properties.level)) {
+                        this.setLevel(feature.properties.level[0]);
+                    } else {
+                        this.setLevel(feature.properties.level);
+                    }
                 }
 
                 this.closePopup();
-- 
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