dix: Use correct listener to deliver touch end events

This fixes an problem left in f682e056
due to an incorrect cherry-pick.

We must use old listener->listener to deliver the touch event. Otherwise
grab won't let the event through and the abovementioned commit has no
effect.

Signed-off-by: Povilas Kanapickas <povilas@radix.lt>
4 jobs for touch-end-event-correct-listener in 5 minutes and 11 seconds (queued for 2 seconds)