Description:
------------
When calling a function in a static context, it appears that get_class reports its class incorrectly.

Reproduce code:
---------------
class Foo extends Bar
{
  
}

class Bar
{
  function test()
  {
    return get_class(new self);
  }
}

print "Should report 'Foo': " . Foo::test();
print "Should report 'Bar': " . Bar::test();

Expected result:
----------------
Should report 'Foo': Foo
Should report 'Bar': Bar

Actual result:
--------------
Should report 'Foo': Bar
Should report 'Bar': Bar