Description:
------------
In the __destructor all changes in the 
$_SESSION array was not saved.


In the php 5.1 it's work corectly. 

Reproduce code:
---------------
session_start();

class test
{
 	function __construct()
 	{
        echo '<br />__construct <br />'; 	
 		var_dump( $_SESSION );
 		
 		if( empty( $_SESSION['iForConstruct'] ) ) 
 		{ 			
 			$_SESSION['iForConstruct'] = 1;
 			$_SESSION['iForDestruct']  = 1;
 		}
 		$_SESSION['iForConstruct']++;
 	}
 	 	
 	function __destruct()
 	{
 		echo '<br />__destruct'; 		
 		$_SESSION['iForDestruct'] ++;  	
 	}	
}
$test = new test();

Expected result:
----------------
In the all refresh we expect incrementing the values of $_SESSION['iForConstruct'] and $_SESSION['iForDestruct']
for all refresh's

Actual result:
--------------
incrementing only $_SESSION['iForConstruct']