Update middleware.go

fixed issue #27

middleware.go

@@ -13,16 +13,13 @@ import (
 
 // Wrap converts a list of middlewares to nested calls (in reverse order)
 func Wrap(handler http.Handler, mws ...func(http.Handler) http.Handler) http.Handler {
-	if len(mws) == 0 {
-		return handler
-	}
-	res := handler
 	for i := len(mws) - 1; i >= 0; i-- {
-		res = mws[i](res)
+		handler = mws[i](handler)
 	}
-	return res
+	return handler
 }
 
+
 // AppInfo adds custom app-info to the response header
 func AppInfo(app, author, version string) func(http.Handler) http.Handler {
 	f := func(h http.Handler) http.Handler {