It appears that the intended behavior of overlay chown was changed
in 00d8d42e9, but the argument handling was not updated to reflect
the removal of overlayKind. This led to a crash when only the
uid was specified, and a processing of the gid as the uid
otherwise.
Signed-off-by: Jonathon Anderson <janderson@ciq.co>
Specifying 0 for gid as a default during chown causes the
gid to be changed to 0 when left unspecified. Changing the
default value to -1 causes the gid to be left unmodified
when unspecified, which is a less surprising behavior.
Signed-off-by: Jonathon Anderson <janderson@ciq.co>
