From b74bd4213c12d662e1146a5b3035d95ba11aaf6f Mon Sep 17 00:00:00 2001
From: Christopher Baines <cb15g11@soton.ac.uk>
Date: Tue, 3 Mar 2015 20:28:36 +0000
Subject: Cope with more failure states in the XMLHTTPRequest

Previously, the callback would not be called if the status was not 200.
---
 src/leaflet-soton.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/leaflet-soton.js b/src/leaflet-soton.js
index 0948789..ba5a138 100644
--- a/src/leaflet-soton.js
+++ b/src/leaflet-soton.js
@@ -1746,8 +1746,12 @@ SELECT * WHERE {\
 
         xhttp.send(options.data);
         xhttp.onreadystatechange = function() {
-            if (xhttp.status == 200 && xhttp.readyState == 4) {
-                callback(JSON.parse(xhttp.responseText), xhttp.responseText);
+            if (xhttp.readyState === 4) { // loaded
+                if (xhttp.status === 200) {
+                    callback(JSON.parse(xhttp.responseText), xhttp.responseText);
+                } else {
+                    callback(null);
+                }
             }
         };
     }
-- 
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