Possible file descriptor leak in maildir_addquota()

[Dan Melomedman]

I am trying to multithread 'pop3dserver.c' taken from an older
courier-imap source tree.
I've turned it into a long-running process,
and what I am seeing with 'lsof' is maildir_addquota doesn't close
the file descriptor for 'maildirsize'. Is this a default behavior?
This is in reference to maildir source from sqwebmail 1.1. Thanks.