event/Loop: destroy the UringWake instance in DisableUring()

src/event/Loop.cxx

@@ -159,8 +159,11 @@ EventLoop::EnableUring(unsigned entries, struct io_uring_params &params)
 void
 EventLoop::DisableUring() noexcept
 {
-	uring_poll.reset();
 	uring.reset();
+#if defined(HAVE_THREADED_EVENT_LOOP) && defined(USE_EVENTFD)
+	uring_wake.reset();
+#endif
+	uring_poll.reset();
 }
 
 Uring::Queue *