-$result = SQL_QUERY("SELECT `id` FROM `{?_MYSQL_PREFIX?}_refsystem` WHERE `level`=0", __FILE__, __LINE__);
-if (SQL_NUMROWS($result) > 0) {
+$result = SQL_QUERY('SELECT `id` FROM `{?_MYSQL_PREFIX?}_refsystem` WHERE `level`=0', __FILE__, __LINE__);
+if (!SQL_HASZERONUMS($result)) {