There's a special distance on wacom tablets where the stylus is close enough to
be (sort of) recongnized by the tablet, but not close enough to send any useful
data. When the pen's in this distance, it will send a distance event with the
value absinfo->maximum or absinfo->minimum, but no other events. Since that
gives the caller the false impression that the tablet is actually in useful
proximity of the tablet, we want to make sure we filter out any events like
this.
Signed-off-by: Stephen Chandler Paul <thatslyude@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
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