over+msgmap: do not store filename after DBI->connect

SQLite already knows the filename internally, so avoid having it
as a long-lived Perl SV to save some bytes when there's many
inboxes and open DBs.

1 files changed, 1 insertions, 1 deletions

diff --git a/t/nntpd.t b/t/nntpd.t
index 954e6e75..aaf6661d 100644
--- a/t/nntpd.t
+++ b/t/nntpd.t
@@ -343,7 +343,7 @@ Date: Fri, 02 Oct 1993 00:00:00 +0000
                 $im->add($ex);
                 $im->done;
                 {
-                        my $f = $ibx->mm->{filename};
+                        my $f = $ibx->mm->{dbh}->sqlite_db_filename;
                         my $tmp = "$tmpdir/tmp.sqlite3";
                         $ibx->mm->{dbh}->sqlite_backup_to_file($tmp);
                         delete $ibx->{mm};