Description:
------------
PHP 5.* allows changing an abstract __construct() signature without any notice. PHP 5.4 issues fatal error.

I didn't find this BC break in news.txt so I think that it is a bug.


Test script:
---------------
<?php
abstract class P {
	abstract function __construct();
}
class C extends P {
	function __construct($a) {
	}
}
?>


Expected result:
----------------
Nothing - same as in PHP 5.*.

The strange thing is that if we replace "abstract function __construct();" by "function __construct() {}" then the behavior is same as in previous versions.

Actual result:
--------------
Fatal error: Declaration of C::__construct() must be compatible with that of P::__construct()