From 5f6873ebc0acd40e4162841d1924ad35a9fbfbac Mon Sep 17 00:00:00 2001
From: Victor Gama <hey@vito.io>
Date: Fri, 20 Feb 2015 21:37:18 -0200
Subject: [PATCH] Ensure message is always defined

---
 lib/websocket/driver/hybi.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/websocket/driver/hybi.js b/lib/websocket/driver/hybi.js
index 71faff5..f7f40f1 100644
--- a/lib/websocket/driver/hybi.js
+++ b/lib/websocket/driver/hybi.js
@@ -171,6 +171,7 @@ var instance = {
 
   pong: function(message) {
       if (this.readyState > 1) return false;
+      message = message ||'';
       return this.frame(message, 'pong');
   },