Don't run step if miniprofiler doesn't exist

Author: oleg-polivannyi

lib/middlewares/express.js

@@ -19,9 +19,14 @@ module.exports = {
         var render = res.render;
         res.render = function() {
           var renderArguments = arguments;
-          req.miniprofiler.step(`Render: ${arguments[0]}`, function() {
+          if (req.miniprofiler) {
+            req.miniprofiler.step(`Render: ${arguments[0]}`, function() {
+              render.apply(res, renderArguments);
+            });
+          }
+          else {
             render.apply(res, renderArguments);
-          });
+          }
         };
 
         if (!handled)