If a XI2.1+ client has a grab on a non-root window, it must still receive
raw events on the root window.
Test case: register for XI_ButtonPress on window and XI_RawMotion on root.
No raw events are received once the press activates an implicit grab on the
window.
X.Org Bug 53897 <http://bugs.freedesktop.org/show_bug.cgi?id=53897>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Keith Packard <keithp@keithp.com>