miscidx: index inbox min/max article numbers

[public-inbox.git] / lib / PublicInbox / Search.pm

diff --git a/lib/PublicInbox/Search.pm b/lib/PublicInbox/Search.pm
index b6141f684ebc61699d6fcf63fe80d2f47fbe15a8..2feb3e13b49d222bc7bd28430a9cf159692a933f 100644 (file)
--- a/lib/PublicInbox/Search.pm
+++ b/lib/PublicInbox/Search.pm
@@ -543,9 +543,10 @@ sub help {
        \@ret;
 }
 
+# always returns a scalar value
 sub int_val ($$) {
        my ($doc, $col) = @_;
-       my $val = $doc->get_value($col) or return; # undefined is '' in Xapian
+       my $val = $doc->get_value($col) or return undef; # undef is '' in Xapian
        sortable_unserialise($val) + 0; # PV => IV conversion
 }