face: initialize m_wantCongestionMarking in factories

Amends commit 0c84164fd08f6758324f56275d9bcbad374f1576

Change-Id: I05dc7afee02abd8053a72f548f4cdd00b5f60d6e
Refs: #4465
diff --git a/daemon/face/unix-stream-factory.hpp b/daemon/face/unix-stream-factory.hpp
index de2391f..9ce7c76 100644
--- a/daemon/face/unix-stream-factory.hpp
+++ b/daemon/face/unix-stream-factory.hpp
@@ -81,8 +81,8 @@
   findChannel(const unix_stream::Endpoint& endpoint) const;
 
 private:
+  bool m_wantCongestionMarking = false;
   std::map<unix_stream::Endpoint, shared_ptr<UnixStreamChannel>> m_channels;
-  bool m_wantCongestionMarking;
 };
 
 } // namespace face