face: initialize m_wantCongestionMarking in factories

Amends commit 0c84164fd08f6758324f56275d9bcbad374f1576

Change-Id: I05dc7afee02abd8053a72f548f4cdd00b5f60d6e
Refs: #4465
diff --git a/daemon/face/tcp-factory.hpp b/daemon/face/tcp-factory.hpp
index 874dd8c..6d3dbce 100644
--- a/daemon/face/tcp-factory.hpp
+++ b/daemon/face/tcp-factory.hpp
@@ -72,8 +72,8 @@
   getChannels() const override;
 
 private:
+  bool m_wantCongestionMarking = false;
   std::map<tcp::Endpoint, shared_ptr<TcpChannel>> m_channels;
-  bool m_wantCongestionMarking;
 };
 
 } // namespace face