From: Andrey Zabolotnyi
Invoking xf86PostProximityEvent with no valuators does nothing, so we
have to provide a valid valuator set to the call.
https://bugs.freedesktop.org/show_bug.cgi?id=104562
[whot: slight change from 104562
abs_vals is reset on every frame but old_vals is kept around to re
Wacom tablet send a farewell reset to 0 on all axes when the tool goes out of
proximity. Ignore those so we can rely on our variuos valuator masks always
having the correct coordinates.
Possible false positive if you manage to go out of proximity right above the
zero datum but meh.
Signed-off-by:
