RightsSetter::splitNegativeAndPositive

private function splitNegativeAndPositive(array $rights)
{
	$negative = $positive = array();
	foreach($rights as $i => $right)
	{
		if(empty($right['NEGATIVE']))
		{
			$positive[] = $right;
		}
		else
		{
			$negative[] = $right;
		}
	}
	unset($right);

	return array($negative, $positive);
}