gdk-win32: Clean Up A Bit
As GLib dropped XP support some time ago [1][2], and the current git master already
depends on a GLib release that is well after it dropped XP support, clean
up the code a bit as we are assured that the code will run on XP and later,
plus, we are dropping XP support during this cycle (i.e. very soon).
https://bugzilla.gnome.org/show_bug.cgi?id=741849
[1]: https://git.gnome.org/browse/glib/commit/?id=
80c24d36f2525d83e458ebbdf62fdbd085945a02
[2]: https://git.gnome.org/browse/glib/commit/?id=
731b46990896665a8107535080bb075a6e18b6f7
projects / gtk4.git / commit