sub _cdr_min_parser_maker {
my $field = shift;
my @fields = ref($field) ? @$field : ($field);
- @fields = qw( billsec duration ) unless scalar(@fields);
+ @fields = qw( billsec duration ) unless scalar(@fields) && $fields[0];
return sub {
my( $cdr, $min ) = @_;
my $sec = eval { _cdr_min_parse($min) };