macos: track grab serial like other backends
authorChristian Hergert <chergert@redhat.com>
Wed, 2 Dec 2020 19:34:31 +0000 (11:34 -0800)
committerChristian Hergert <chergert@redhat.com>
Wed, 2 Dec 2020 19:34:31 +0000 (11:34 -0800)
commit26b9254ac768593cb772a9a84b5f2823c69bd624
tree404a032366c0745fcacb9f19704395a0cf7a05b5
parentf11c23f4071f9bc8f9f53cbf3690ede791f6d429
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.
gdk/macos/gdkmacosdevice.c