Commit 0e08e5083 ("xwayland: prevent X11 get enter event when pointer is
over Wayland client") introduced a pointer crossing count to avoid
sending spurious pointer enter events when the pointer is within a
Wayland native surface.
However, that change breaks tablet devices, as the pointer enter count
is only updated from the wl_pointer enter/leave events, a slave X11
device such as a tablet pointer would report a lost focus and the event
wrongly sent to the root window.
To avoid the issue, revert partially commit 0e08e5083 to return FALSE
as before for the slave devices. The rest of the logic from commit
0e08e5083 remains unchanged, so that we do not send spurious
XCrossingEvents for the pointer device when it's within a native Wayland
surface.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Closes: https://gitlab.freedesktop.org/xorg/xserver/-/work_items/1884
(cherry picked from commit c39b1591b2)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2179>