macos: track grab serial like other backends

This is what is done elsewhere, so copy that here too now that we actually
generate serials for events.

diff --git a/gdk/macos/gdkmacosdevice.c b/gdk/macos/gdkmacosdevice.c
index 5c97d24799e6af6ee01d1ef53090cb13238a6ff2..adc58be7f6149419c173a9ffe104866dd7a26172 100644 (file)
--- a/gdk/macos/gdkmacosdevice.c
+++ b/gdk/macos/gdkmacosdevice.c
@@ -122,7 +122,7 @@ gdk_macos_device_ungrab (GdkDevice *device,
   grab = _gdk_display_get_last_device_grab (display, device);
 
   if (grab != NULL)
-    grab->serial_end = 0;
+    grab->serial_end = grab->serial_start;
 
   _gdk_display_device_grab_update (display, device, 0);
 }