Problem: formatting errors introduced by PR #3237

Solution: fix them

src/udp_engine.cpp

@@ -221,6 +221,7 @@ void zmq::udp_engine_t::plug (io_thread_t *io_thread_, session_base_t *session_)
             //  In multicast we should bind ANY and use the mreq struct to
             //  specify the interface
             any.set_port (bind_addr->port ());
+
             real_bind_addr = &any;
         } else {
             real_bind_addr = bind_addr;