Check whether mask is NULL

diff --git a/gdk/quartz/gdkdevice-core-quartz.c b/gdk/quartz/gdkdevice-core-quartz.c
index f42cc5d18d0dee7f80a892c2ea6d50e9a63269ff..2f8781cde52cc727231a57b613755b0b0c5477f8 100644 (file)
--- a/gdk/quartz/gdkdevice-core-quartz.c
+++ b/gdk/quartz/gdkdevice-core-quartz.c
@@ -213,7 +213,8 @@ gdk_quartz_device_core_query_state_helper (GdkWindow       *window,
 
   toplevel = gdk_window_get_effective_toplevel (window);
 
-  *mask = _gdk_quartz_events_get_current_event_mask ();
+  if (mask)
+    *mask = _gdk_quartz_events_get_current_event_mask ();
 
   /* Get the y coordinate, needs to be flipped. */
   if (window == _gdk_root)