altid: fix miscopied field name

Oops :x

diff --git a/lib/PublicInbox/AltId.pm b/lib/PublicInbox/AltId.pm
index f8aa4cb8cf71a244d369fc671bf3639d635acdb4..4a6ff97cc5e4aca470504123bbc30ce68dac6744 100644 (file)
--- a/lib/PublicInbox/AltId.pm
+++ b/lib/PublicInbox/AltId.pm
@@ -39,7 +39,7 @@ sub mm_alt {
        my ($self) = @_;
        $self->{mm_alt} ||= eval {
                my $f = $self->{filename};
-               my $writable = $self->{filename};
+               my $writable = $self->{writable};
                PublicInbox::Msgmap->new_file($f, $writable);
        };
 }