From a2b9f593f5e55356e99a310929141495b68b1c3b Mon Sep 17 00:00:00 2001
From: Tom Hughes <tom@compton.nu>
Date: Sat, 30 Nov 2013 13:20:31 +0000
Subject: [PATCH] Don't throw an exception if the hash doesn't contain a map
 argument

---
 app/assets/javascripts/osm.js.erb | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/app/assets/javascripts/osm.js.erb b/app/assets/javascripts/osm.js.erb
index 392bf5e0c..c41f040f3 100644
--- a/app/assets/javascripts/osm.js.erb
+++ b/app/assets/javascripts/osm.js.erb
@@ -115,6 +115,10 @@ OSM = {
 
     hash = querystring.parse(hash);
 
+    if (!(map in hash)) {
+      return false;
+    }
+
     var args = hash.map.split("/");
     if (args.length !== 3) {
       return false;
-- 
2.43.2