Xwayland: remove xwm from selection seat listeners on destroy

xwayland/xwm.c

@@ -1114,6 +1114,10 @@ void xwm_destroy(struct wlr_xwm *xwm) {
 	wl_list_for_each_safe(xsurface, tmp, &xwm->unpaired_surfaces, link) {
 		wlr_xwayland_surface_destroy(xsurface);
 	}
+	if (xwm->seat) {
+		wl_list_remove(&xwm->seat_selection.link);
+		wl_list_remove(&xwm->seat_primary_selection.link);
+	}
 	wl_list_remove(&xwm->compositor_surface_create.link);
 	xcb_disconnect(xwm->xcb_conn);