This fixes a crash when a DeviceEvent struct converted to
InteralEvent was beeing copied as InternalEvent (and thus
causing out of bounds reads) in ActivateGrabNoDelivery()
in events.c: 3876 *grabinfo->sync.event = *real_event;
Possible fix for https://gitlab.freedesktop.org/xorg/xserver/-/issues/1253
Signed-off-by: Matthieu Herrb <matthieu@herrb.eu>
(cherry picked from commit 5b8817a019)