// Exclude default referral id if set
$userExclusionSql = ' ';
$excludedUserids = runFilterChain('config_userid_exclusion_sql', array());
-if (count($excludedUserids) > 0) {
+if (isFilledArray($excludedUserids)) {
// Exclude all
$userExcludeSql = ' AND `d`.`userid` NOT IN (' . implode(', ', $excludedUserids) . ')';
} // END - if