Description:
------------
In class structures where the sub-classes are extended non-linearly (i.e. multiple classes on the same tier), the sub-classes in different lines cannot access methods defined as protected in a shared parent class in eachother.

Actually this is a clone of bug 37212 but for method instead of variables.

Reproduce code:
---------------
class A {
	protected function testProtected() { echo "Test Protected Called in A"; }
}

class B extends A {
    public function doTest (A $obj) {
		$obj->testProtected();
    }
}

class C extends A {
	protected function testProtected() { echo "Test Protected Called in C"; }
}

$B = new B;
$C = new C;
$B->doTest ($C); // fatal

?>

Expected result:
----------------
Test Protected Called in C


Actual result:
--------------
Fatal error: Call to protected method C::testProtected() from context 'B' in c:\program files\apache group\Apache\htdocs\cinh.php on line 8