[PATCH weston] xwm: do not crash when activating a NULL surface

[Giulio Camuffo]

---
 src/xwayland/window-manager.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/xwayland/window-manager.c b/src/xwayland/window-manager.c
index d565888..b710560 100644
--- a/src/xwayland/window-manager.c
+++ b/src/xwayland/window-manager.c
@@ -610,11 +610,15 @@ static void
 weston_wm_window_activate(struct wl_listener *listener, void *data)
 {
 	struct weston_surface *surface = data;
-	struct weston_wm_window *window = get_wm_window(surface);
+	struct weston_wm_window *window = NULL;
 	struct weston_wm *wm =
 		container_of(listener, struct weston_wm, activate_listener);
 	xcb_client_message_event_t client_message;
 
+	if (data) {
+		window = get_wm_window(surface);
+	}
+
 	if (window) {
 		client_message.response_type = XCB_CLIENT_MESSAGE;
 		client_message.format = 32;
-- 
1.8.3.4