Description:
------------
Array data members behave incorrect when class inherits from builtin one. The first push to the member array is ignored, the other pushes work as usual.

Reproduce code:
---------------
class Test extends XMLReader
{
    private $testArr = array();

    public function __construct()
    {
        $this->testArr[] = 1;
        var_dump($this->testArr);
    }
}

Expected result:
----------------
array(1) {
   [0] => int(1)
}

Actual result:
--------------
array(0) {
}