Description:
------------
When overloading a class with a property containing an array by assigning an element to to the new array the __set handle does not fire, but the element gets created.

Reproduce code:
---------------
<?php
class myclass {
	public function __set($name,$data) {
		echo("Name: {$name}<br/>\nData: {$data}<br/>\n"); //prints out input when fired
	}
}

$test=new myclass();
$test->style['temp']='content'; //creates a new property

print_r($test->style); //check if property is created
?>

Expected result:
----------------
Results from the echo in __set

Actual result:
--------------
The result of the print_r shows that the property is created, but id did not pass the __set