For expediency, it made sense to always have the X and Y axes set for
direct touch device event propagation. The last X and Y values are
stored internally. However, indirect device touch event propagation
does not depend on the touch's X and Y values. Thus, we don't need to
set the values for every indirect touch event.
On top of this, the previous X and Y values aren't stored for indirect
touches, so without this change the axes get erroneously set to 0.
Signed-off-by: Chase Douglas <chase.douglas@canonical.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>