validate_cline_row(void)
{
    /*
     * First make sure that w_topline is valid (after moving the cursor).
     */
    update_topline();
    check_cursor_moved(curwin);
    if (!(curwin->w_valid & VALID_CROW))
	curs_rows(curwin);
}
validate_cline_row(void)
{
     
    update_topline();
    check_cursor_moved(curwin);
    if (!(curwin->w_valid & VALID_CROW))
	curs_rows(curwin);
}