gplugin/gplugin

Add some additional error checking to gplugin_native_loader_query

Testing Done:
Ran the unit tests

Reviewed at https://reviews.imfreedom.org/r/1848/
[wrap-git]
directory=gi-docgen
url=https://gitlab.gnome.org/GNOME/gi-docgen.git
push-url=ssh://git@gitlab.gnome.org:GNOME/gi-docgen.git
revision=main
depth=1