xwayland: Handle selection source going away without crashing
diff --git a/src/xwayland/xwayland.h b/src/xwayland/xwayland.h
index 1b1cdff..5922dda 100644
--- a/src/xwayland/xwayland.h
+++ b/src/xwayland/xwayland.h
@@ -62,6 +62,7 @@
 	struct wl_listener activate_listener;
 
 	xcb_window_t selection_window;
+	xcb_window_t selection_owner;
 	int incr;
 	int data_source_fd;
 	struct wl_event_source *property_source;