xwayland: Don't discard ready signals

The xwayland ready signals are used to do initial setup like starting xwm.
Discarding the signals means that the handler functions will not be called
in the case that Xwayland is restarted and thus, xwm managed clients fail.

Fixes #2174."

xwayland/server.c

@@ -232,8 +232,6 @@ static int xserver_handle_ready(int signal_number, void *data) {
 		.wm_fd = server->wm_fd[0],
 	};
 	wlr_signal_emit_safe(&server->events.ready, &event);
-	/* ready is a one-shot signal, fire and forget */
-	wl_signal_init(&server->events.ready);
 
 	return 1; /* wayland event loop dispatcher's count */
 

xwayland/xwayland.c

@@ -55,8 +55,6 @@ static void handle_server_ready(struct wl_listener *listener, void *data) {
 	}
 
 	wlr_signal_emit_safe(&xwayland->events.ready, NULL);
-	/* ready is a one-shot signal, fire and forget */
-	wl_signal_init(&xwayland->events.ready);
 }
 
 void wlr_xwayland_destroy(struct wlr_xwayland *xwayland) {