fix missing callback
@@ -255,6 +255,7 @@ static inline subscription_s *subscription_create(subscribe_args_s args) {
.node = (fio_ls_embd_s)FIO_LS_INIT(s->node),
.parent = NULL,
.on_message = args.on_message,
+ .on_unsubscribe = args.on_unsubscribe,
.udata1 = args.udata1,
.udata2 = args.udata2,
.ref = 1,
