When building against a newer inputproto, the server may support fewer
than XI_LASTEVENT events. We already have XI2LASTEVENT for the highest
event number supported by the server, so use that instead.
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Chase Douglas <chase.douglas@canonical.com>