don't send session request twice

SSU.cpp

@@ -491,10 +491,11 @@ namespace ssu
 	}
 
 	void SSUSession::Connect ()
+	{
+		if (m_State == eSessionStateUnknown)
 		{	
 			if (m_Server)
 			{	
-			if (!m_ConnectTimer)
 				m_ConnectTimer = new boost::asio::deadline_timer (m_Server->GetService ());
 				m_ConnectTimer->expires_from_now (boost::posix_time::seconds(SSU_CONNECT_TIMEOUT));
 				m_ConnectTimer->async_wait (boost::bind (&SSUSession::HandleConnectTimer,
@@ -502,6 +503,7 @@ namespace ssu
 			}		
 			SendSessionRequest ();
 		}	
+	}
 
 	void SSUSession::HandleConnectTimer (const boost::system::error_code& ecode)
 	{