Description:
------------
I think the method name shouldn't cast to lower case if static calling used.

Reproduce code:
---------------
class a
{
    function __call($name, $p)
    {
        echo $name . ' ';
    }

    function foo()
    {
        $this->BaR();
        self::BaR();
    }
}

$a = new a();
$a->BaZ();
$a->foo();

Expected result:
----------------
BaZ BaR BaR 

Actual result:
--------------
BaZ BaR bar