Since we call directly into XKB and may be doing so before the extension
has been initialised, make sure its privates are set up first. XTest
had a hack to do this itself, but seems cleaner to just make sure we do
it in AllocDevicePair.
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Keith Packard <keithp@keithp.com>