trivial: Fix the self tests from the last commit
trivial: Fix the self tests from the last commit

Of course this was going to change the number of warnings... coffee time...

ximion/appstream-glib,hughsie/appstream-glib,ximion/appstream-glib,hughsie/appstream-glib,hughsie/appstream-glib,ximion/appstream-glib