fix scalar_sql not to return empty string for zero

diff --git a/FS/FS/Record.pm b/FS/FS/Record.pm
index 94f69b1..f2d18d9 100644 (file)
--- a/FS/FS/Record.pm
+++ b/FS/FS/Record.pm
@@ -2807,7 +2807,8 @@ sub scalar_sql {
   my $sth = dbh->prepare($sql) or die dbh->errstr;
   $sth->execute
     or die "Unexpected error executing statement $sql: ". $sth->errstr;
-  $sth->fetchrow_arrayref->[0] || '';
+  my $scalar = $sth->fetchrow_arrayref->[0];
+  defined($scalar) ? $scalar : '';
 }
 
 =back