Description:
------------
It's a bag like 28840, but with class ffi.
When you create a class by extending ffi and add a
destructor to it, it
doesn't get called when the object gets out of scope.


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

class test extends ffi
{
    function __construct( $param ){ parent::__construct($param); echo "born\n"; }
    function __destruct() { parent::__destruct(); echo "died\n"; }
}

$test = new test;
unset($test);

?>


Expected result:
----------------
born
died


Actual result:
--------------
born