protocol-native: make the connection earlier

Make the connection as soon as we create the client. We create it
without file descriptor and then set it when we connect. This
makes it possible to use the connection to queue messages before
we connect.

src/modules/module-protocol-native/connection.c

@@ -266,6 +266,12 @@ no_mem:
 	return NULL;
 }
 
+int pw_protocol_native_connection_set_fd(struct pw_protocol_native_connection *conn, int fd)
+{
+	conn->fd = fd;
+	return 0;
+}
+
 /** Destroy a connection
  *
  * \param conn the connection to destroy