graphics/wayland: merge upstream fix for CVE-2013-2003

This is upstream MR 133,
	https://gitlab.freedesktop.org/wayland/wayland/-/merge_requests/133
which in turn is a Wayland-ified version of the fix to libXcursor.

PR:		256273
Reported by:	Evgeniy Khramtsov
Approved by:	zeising (x11)