From accb1d6a611d18773e84f8b6e076dad546f3f91f Mon Sep 17 00:00:00 2001
From: Jonathan Ong <jonathanrichardong@gmail.com>
Date: Fri, 8 Nov 2013 01:17:41 -0800
Subject: [PATCH] pass an optional `next` to app.callback()

---
 lib/application.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/application.js b/lib/application.js
index bf28587..d511ff5 100644
--- a/lib/application.js
+++ b/lib/application.js
@@ -88,10 +88,10 @@ app.callback = function(){
   var gen = compose(mw);
   var self = this;
 
-  return function(req, res){
+  return function(req, res, next){
     var ctx = new Context(self, req, res);
 
-    co.call(ctx, gen)(ctx.onerror);
+    co.call(ctx, gen)(next || ctx.onerror);
   }
 };