From 19aba114e7226f544275f60b42d88362885eca10 Mon Sep 17 00:00:00 2001
From: Tom MacWright <tom@macwright.org>
Date: Fri, 8 Mar 2013 15:16:42 -0500
Subject: [PATCH] Fix overeager lookup. Fixes #907

---
 js/id/renderer/background.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/id/renderer/background.js b/js/id/renderer/background.js
index 8ed619f8e..02e94f615 100644
--- a/js/id/renderer/background.js
+++ b/js/id/renderer/background.js
@@ -66,7 +66,7 @@ iD.Background = function() {
         tile().forEach(function(d) {
             addSource(d);
             requests.push(d);
-            if (!cache[d[3]] && lookUp(d)) {
+            if (cache[d[3]] === false && lookUp(d)) {
                 requests.push(addSource(lookUp(d)));
             }
         });