Description:
------------
ArrayObject::ARRAY_AS_PROPS fails to work in the __destruct method



Reproduce code:
---------------
<?php
class destructTest extends ArrayObject
{

	public function __construct( )
	{
		$defaults = array('hello' => "world\n");
		parent::__construct($defaults, ArrayObject::ARRAY_AS_PROPS);
	}

	public function say( )
	{
		echo $this->hello;
	}

	public function __destruct()
	{
		echo $this->hello;
	}

}

$myArrayObject = new destructTest;
$myArrayObject->say();

// Lets destroy the object by reusing the variable
$myArrayObject = 1;

echo 'Test Completed';
?>

Expected result:
----------------
world
world
Test Completed

Actual result:
--------------
world
( ! ) Notice: Undefined property: destructTest::$hello in /home/ross/www/tmp/arrayObject.php on line 18
Call Stack
#	Time	Memory	Function	Location
1	0.0002	60400	{main}( )	../arrayObject.php:0
2	0.0003	61216	destructTest->__destruct( )	../arrayObject.php:0
Test Completed