face: Implementing forgotten isListening() feature in TcpChannel

Change-Id: Idfcd8337d16b414d2f739f936660dffdce413729
diff --git a/daemon/face/tcp-channel.cpp b/daemon/face/tcp-channel.cpp
index 28fdfa5..4c438be 100644
--- a/daemon/face/tcp-channel.cpp
+++ b/daemon/face/tcp-channel.cpp
@@ -16,6 +16,7 @@
 
 TcpChannel::TcpChannel(const tcp::Endpoint& localEndpoint)
   : m_localEndpoint(localEndpoint)
+  , m_isListening(false)
 {
   this->setUri(FaceUri(localEndpoint));
 }
@@ -45,6 +46,8 @@
                            bind(&TcpChannel::handleSuccessfulAccept, this, _1,
                                 clientSocket,
                                 onFaceCreated, onAcceptFailed));
+
+  m_isListening = true;
 }
 
 void