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, 2 insertions, 2 deletions

diff --git a/lib/PublicInbox/Inbox.pm b/lib/PublicInbox/Inbox.pm
index 3d9754dc..267be4e3 100644
--- a/lib/PublicInbox/Inbox.pm
+++ b/lib/PublicInbox/Inbox.pm
@@ -204,9 +204,9 @@ sub search ($;$) {
 sub over ($) {
         my ($self) = @_;
         my $srch = search($self, 1) or return;
-        $self->{over} ||= eval {
+        $self->{over} //= eval {
                 my $over = $srch->{over_ro};
-                $over->dbh_new; # may fail
+                $over->connect; # may fail
                 $over;
         }
 }