Description:
------------
In test file array_022.phpt we see the clone being changed but this does not change original, If you clone an ArrayIterator you also clone its reference.

If you take such a self-wrapping ArrayIterator and clone it, the clone is no longer self-wrapping: the clone wraps the original. HOWEVER, I *think* the SPL_ARRAY_IS_SELF flag is being copied to the clone 

Therefore, the clone starts to store/retrieve data from itself rather than from its wrapped container - hence the difference. 

Reproduce code:
---------------
<?php

class MyArrayIterator extends ArrayIterator
{
	public function __construct()
	{
		parent::__construct($this);
		$this['bar'] = 'baz';
	}
}

$a = new MyArrayIterator;

$b = clone $a;
$b['baz'] = 'Foo';

var_dump($a);
var_dump($b);

?>

Expected result:
----------------
object(MyArrayIterator)#%d (2) {
  ["bar"]=>
  string(3) "baz"
  ["baz"]=>
  string(3) "Foo"
}
object(MyArrayIterator)#%d (2) {
  ["bar"]=>
  string(3) "baz"
  ["baz"]=>
  string(3) "Foo"
}

Actual result:
--------------
object(MyArrayIterator)#%d (1) {
  ["bar"]=>
  string(3) "baz"
}
object(MyArrayIterator)#%d (2) {
  ["bar"]=>
  string(3) "baz"
  ["baz"]=>
  string(3) "Foo"
}