mutex was returned;

lib/messagesx.c

@@ -122,10 +122,12 @@ static inline int __sxmsg_send(chnl_t *channel, const char *data, size_t datalen
     pthread_mutex_unlock(&co->write_pending_lock);
   }
 
-  //pthread_mutex_lock(&msg->wait); /* we will sleep here */
+  pthread_mutex_lock(&msg->wait); /* we will sleep here */
+#if 0
   while(pthread_mutex_trylock(&msg->wait)) {
     //printf("here opcode = %d\n", head->opcode);
   }
+#endif
 
   if(head->payload_length) {
     *omsg = msg;