taxonomy_select_nodes returning limited number of nodes always

modules/taxonomy/taxonomy.module:

    if ($pager) {
      $result = pager_query($sql, variable_get('default_nodes_main', 10), 0, $sql_count, $args);
    }
    else {
      $result = db_query_range($sql, $args, 0, variable_get('feed_default_items', 10));
    }
  }