From 5eb65f2b77deb997f2a4e8de9f709328736cc907 Mon Sep 17 00:00:00 2001
From: Rufus Pollock <rufus.pollock@okfn.org>
Date: Tue, 17 Apr 2012 05:27:09 +0100
Subject: [PATCH] [view-map,bugfix][xs]: only call invalidateMapsize on
 view:show if map defined.

* this issue arose in case when map is the first view being shown.
---
 src/view-map.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/view-map.js b/src/view-map.js
index 6759c55e..9ceb07b1 100644
--- a/src/view-map.js
+++ b/src/view-map.js
@@ -117,7 +117,9 @@ my.Map = Backbone.View.extend({
     // If the div was hidden, Leaflet needs to recalculate some sizes
     // to display properly
     this.bind('view:show',function(){
-        self.map.invalidateSize();
+        if (self.map) {
+          self.map.invalidateSize();
+        }
     });
 
     var stateData = _.extend({