[minor] code style changes

lib/node-http-proxy.js

@@ -180,8 +180,7 @@ exports.createServer = function () {
           host: host
         });
       }
-      if(middleware.length)
-        middleware.push(handler)
+      if(middleware.length) middleware.push(handler)
     }
     else if (proxy.proxyTable) {
       //
@@ -191,14 +190,10 @@ exports.createServer = function () {
       handler = function (req, res) {
         proxy.proxyRequest(req, res);
       }
-      if(middleware.length)
-        middleware.push(handler)
+      if(middleware.length) middleware.push(handler)
     }
 
-  if(middleware.length)
-    //handler = callback = middleware.shift()
-    //else if (middleware.length)
-    handler = callback = stack(middleware, proxy);
+  if(middleware.length) handler = stack(middleware, proxy);
 
   if (!handler) {
     //