[PATCH 1/2] search: support Subject:-less messages

[Eric Wong <e@80x24.org>]

Some mailing lists allow empty Subject headers and we shall support
searching and indexing them.
---
 lib/PublicInbox/Search.pm | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/lib/PublicInbox/Search.pm b/lib/PublicInbox/Search.pm
index bf50365..3a908ac 100644
--- a/lib/PublicInbox/Search.pm
+++ b/lib/PublicInbox/Search.pm
@@ -107,12 +107,15 @@ sub get_thread {
 
 	return { total => 0, msgs => [] } unless $smsg;
 	my $qtid = Search::Xapian::Query->new(xpfx('thread').$smsg->thread_id);
-	my $path = id_compress($smsg->path);
-	my $qsub = Search::Xapian::Query->new(xpfx('path').$path);
-	my $query = Search::Xapian::Query->new(OP_OR, $qtid, $qsub);
+	my $path = $smsg->path;
+	if (defined $path && $path ne '') {
+		my $path = id_compress($smsg->path);
+		my $qsub = Search::Xapian::Query->new(xpfx('path').$path);
+		$qtid = Search::Xapian::Query->new(OP_OR, $qtid, $qsub);
+	}
 	$opts ||= {};
 	$opts->{limit} ||= 1000;
-	_do_enquire($self, $query, $opts);
+	_do_enquire($self, $qtid, $opts);
 }
 
 sub _do_enquire {