view: support non-existent Subjects for permalink titles

Showing "(no subject)" seems like a common fallback for
messages without a Subject header.

diff --git a/lib/PublicInbox/View.pm b/lib/PublicInbox/View.pm
index b6fa2a3d81886dd480978ea8efefd0bbfea0973a..8e81391e106e67584527b8fa17287f3cc16a3ecb 100644 (file)
--- a/lib/PublicInbox/View.pm
+++ b/lib/PublicInbox/View.pm
@@ -353,6 +353,7 @@ sub _msg_html_prepare {
                $rv .= "$h: $v\n";
 
        }
+       $title[0] ||= '(no subject)';
        $ctx->{-title_html} = join(' - ', @title);
        $rv .= 'Message-ID: <' . $mid->as_html . '> ';
        $rv .= "(<a\nhref=\"raw\">raw</a>)\n";