Backport !3989 “completion: make gsettings work in nounset mode” to glib-2-80
With the shell in nounset mode, an error is emitted on referencing
schemadir
as it is not initialized in all code paths.
Initialize to an empty string to fix.
Signed-off-by: Ville Skyttä ville.skytta@iki.fi
Trivial backport of !3989 (merged) to glib-2-80
.