Block::changeLanding

public function changeLanding($lid)
{
	if ($this->access < $this::ACCESS_W)
	{
		$this->error->addError(
			'ACCESS_DENIED',
			Loc::getMessage('LANDING_BLOCK_ACCESS_DENIED')
		);
		return false;
	}
	$res = parent::update($this->id, array(
		'LID' => (int)$lid,
		'PARENT_ID' => null,
		'PUBLIC' => 'N'
	));
	$this->error->addFromResult($res);
	return $res->isSuccess();
}