Description:
------------
Overloading the function __call() results in __call() not be executed when a class is extended.  Having the __call() overload in the parent, child or both makes no difference.

Reproduce code:
---------------
<?php
class extendable {	
	function blah (){
		print 'blah';
	}
}
class extendee extends extendable {
	function __call ($method, $args){
		print $method;
	}
}
$test = new extendee ();
$test->blah ();
?>
<?php
class extendable {	
	function __call ($method, $args){
		print $method;
	}
	function blah (){
		print 'blah';
	}
}
class extendee extends extendable {
}
$test = new extendee ();
$test->blah ();
?>
<?php
class b {	
	function blah (){
		print "In method: blah";
	}
}
class a extends b {
	function __call ($method, $args){
		print '__call(): '.$method;
	}
}
$test = new a ();
$test->blah ();
?>

Expected result:
----------------
__call():blah
In method: blah

Actual result:
--------------
In method: blah