From 5427c15d94a7991282e702fd4bd85ff168ad1a4b Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Thu, 31 Mar 2016 14:29:30 +0900
Subject: [PATCH] [Modify] Add a check

---
 websocket-sharp/Net/EndPointListener.cs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/websocket-sharp/Net/EndPointListener.cs b/websocket-sharp/Net/EndPointListener.cs
index 61d06ada..4052a12b 100644
--- a/websocket-sharp/Net/EndPointListener.cs
+++ b/websocket-sharp/Net/EndPointListener.cs
@@ -451,6 +451,9 @@ namespace WebSocketSharp.Net
 
       List<HttpConnection> conns = null;
       lock (_unregisteredSync) {
+        if (_unregistered.Count == 0)
+          return;
+
         conns = new List<HttpConnection> (_unregistered.Keys);
         _unregistered.Clear ();
       }