Whitespace fix

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Fix up for new libinput API - without touch subtypes

Touch types are now top-level event types.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Do not set valuators for touch up events

the kernel does not send any ABS_MT_POSITION_X|Y data while releasing
the touch, so use the previous values to set the position of the release.

If it's not done, the touch up occurs at (0,0) and moves dragged elements
to the upper right corner.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>