Empty URL crashes the server

lib/server/controllers/apiController.js

@@ -21,7 +21,7 @@ var ApiController = function(app) {
     app.post('/api/runs', function(req, res) {
 
         // Add http to the test URL
-        if (req.body.url.toLowerCase().indexOf('http://') !== 0 && req.body.url.toLowerCase().indexOf('https://') !== 0) {
+        if (req.body.url && req.body.url.toLowerCase().indexOf('http://') !== 0 && req.body.url.toLowerCase().indexOf('https://') !== 0) {
             req.body.url = 'http://' + req.body.url;
         }