wayland: Fix elementary setting window parents at creation time

wayland: Fix elementary setting window parents at creation time

Summary:
We need to pass the entire pointer, not just 32-bits of it.

Fixes a crash with enlightenment sandbox gadgets where
ecore_wl2_window_alpha_get() is called with an invalid pointer while
trying to display a pop-up.

Reviewers: zmike, devilhorns

Reviewed By: zmike, devilhorns

Subscribers: devilhorns, cedric, #reviewers, #committers, zmike

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D6775