From f24309ad3e7b2a805f032afdef9765dc6d0bc022 Mon Sep 17 00:00:00 2001
From: John Firebaugh <john.firebaugh@gmail.com>
Date: Wed, 13 Nov 2013 16:01:54 -0800
Subject: [PATCH] Don't set state if it doesn't exist

---
 app/assets/javascripts/router.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/app/assets/javascripts/router.js b/app/assets/javascripts/router.js
index fbad1e28c..5b9cdad07 100644
--- a/app/assets/javascripts/router.js
+++ b/app/assets/javascripts/router.js
@@ -88,8 +88,10 @@ OSM.Router = function(map, rts) {
       currentRoute = routes.recognize(currentPath);
       currentRoute.run('popstate', currentPath);
       var state = e.originalEvent.state;
-      map.setView(state.center, state.zoom, {animate: false});
-      map.updateLayers(state.layers);
+      if (state.center) {
+        map.setView(state.center, state.zoom, {animate: false});
+        map.updateLayers(state.layers);
+      }
     });
 
     return function (url) {
-- 
2.39.5