From b775b19366dca169246b906e27bf6244f786c86e Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Sun, 11 Sep 2011 00:12:18 +0900
Subject: [PATCH] Check socket is null or not before calling
 (add|delete)SocketForReadCheck.

---
 src/DHTInteractionCommand.cc | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/DHTInteractionCommand.cc b/src/DHTInteractionCommand.cc
index 101d6a22..ff17a8a6 100644
--- a/src/DHTInteractionCommand.cc
+++ b/src/DHTInteractionCommand.cc
@@ -63,12 +63,16 @@ DHTInteractionCommand::~DHTInteractionCommand()
 void DHTInteractionCommand::setReadCheckSocket(const SocketHandle& socket)
 {
   readCheckSocket_ = socket;
-  e_->addSocketForReadCheck(socket, this);
+  if(socket) {
+    e_->addSocketForReadCheck(socket, this);
+  }
 }
 
 void DHTInteractionCommand::disableReadCheckSocket(const SocketHandle& socket)
 {
-  e_->deleteSocketForReadCheck(socket, this);
+  if(socket) {
+    e_->deleteSocketForReadCheck(socket, this);
+  }
 }
 
 bool DHTInteractionCommand::execute()