Description:
------------
If you have a method with a parameter whose default is a local class constant, the ReflectionObject throws a Fatal Error.

Reproduce code:
---------------
<?php
class foo {
 const BAR = "foo's bar";

 function test ($s_Text = self::BAR) {
  echo $s_Text, PHP_EOL;
 }

}

$o_Foo = new foo();

ReflectionObject::export($o_Foo);

Expected result:
----------------
Object of class [ <user> class foo ] {
  @@ C:\tr.php 2-9

  - Constants [1] {
    Constant [ string BAR ] { foo's bar }
  }

  - Static properties [0] {
  }

  - Static methods [0] {
  }

  - Properties [0] {
  }

  - Dynamic properties [0] {
  }

  - Methods [1] {
    Method [ <user> public method test ] {
      @@ C:\tr.php 5 - 7

      - Parameters [1] {
        Parameter #0 [ <optional> $s_Text = self::BAR]
      }
    }
  }
}

Actual result:
--------------
Fatal error: Undefined class constant 'self::BAR' in C:\tr.php on line 13