Code cleanup

src/stream_engine.hpp

@@ -77,7 +77,6 @@ namespace zmq
         void timer_event (int id_);
 
     private:
-
         //  Unplug the engine from the session.
         void unplug ();
 
@@ -115,6 +114,9 @@ namespace zmq
 
         void set_handshake_timer();
 
+        typedef metadata_t::dict_t properties_t;
+        bool init_properties (properties_t & properties);
+
         //  Underlying socket.
         fd_t s;