From 399bed34ad6dd0239c2f7b74b19dd74fd151e304 Mon Sep 17 00:00:00 2001
From: Sandro Santilli <strk@keybit.net>
Date: Mon, 10 Feb 2014 11:26:21 +0100
Subject: [PATCH] Do not try to replace template variables in undefined
 elements

See #133
---
 lib/cartodb/template_maps.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/cartodb/template_maps.js b/lib/cartodb/template_maps.js
index d067632b..172bdbcc 100644
--- a/lib/cartodb/template_maps.js
+++ b/lib/cartodb/template_maps.js
@@ -581,8 +581,8 @@ o.instance = function(template, params) {
   var layergroup = JSON.parse(JSON.stringify(template.layergroup));
   for (var i=0; i<layergroup.layers.length; ++i) {
     var lyropt = layergroup.layers[i].options;
-    lyropt.cartocss = this._replaceVars(lyropt.cartocss, all_params);
-    lyropt.sql = this._replaceVars(lyropt.sql, all_params);
+    if ( lyropt.cartocss ) lyropt.cartocss = this._replaceVars(lyropt.cartocss, all_params);
+    if ( lyropt.sql) lyropt.sql = this._replaceVars(lyropt.sql, all_params);
     // Anything else ?
   }
   return layergroup;