Description:
------------
A segmentation fault occurs when extending two classes.


Reproduce code:
---------------
<?php
class CACHE extends memcache
{
  public function GetKey($key)
  {
    $this->connect('unix:///tmp/memcache1.sock',0);
    $value = $this->get($key);
    return $value;
  }
}
class Users extends CACHE
{
	function Get($key)
	{
		$return = $this->GetKey($key);
		return $return;
	}
}
$cache = new Users;
$cache->Get('key');
?>

Expected result:
----------------
The memcached results

Actual result:
--------------
Segmentation Fault