devel/lua-lgi: unbreak lua-lgi after glib 2.88.3 upgrade

Minimal port of lua-lgi fix for new Glib

PR: 297414
Reported by: Kan Sasaki <sasaki12@gmail.com>
Obtained from: https://github.com/lgi-devs/lgi/pull/361
Approved by: portmgr (build and runtime fix blanket)