Description:
------------
PHP causing php-cgi.exe crash when creating child class with default constructor values.

$this->sp_user_count = new oopi_Label($this);

oopi_label is class oopi_Label extends oopi_Control which just happens to have constructor 

__construct($parent, $id = '', $value = NULL)

somehow just calling it with $this resulted in PHP self destructing


Reproduce code:
---------------
class oopi_Control
{
   public $id;

   public function __construct($parent, $id = '', $value = NULL)
   {
     ...
     $this->id = $id;
     ...
   }
};

class oopi_Label extends oopi_Control
{
  ...
};

$sp_user_count = new oopi_Label($this);

Expected result:
----------------
Created object with default id of ''

Actual result:
--------------
No results - CGI crash reading null pointer and returning no headers.