[patch] : Tiny change to _NullClass in <tr1/tuple>

[chris jefferson <caj at cs dot york dot ac dot uk>]

This very tiny patch just removed the body of _NullClass, which is used 
as a placeholder in tr1::tuple

This type should never be seen by users, however, I found someone who 
was (accidentally) making objects of this type (by accessing the 3rd 
type of a tuple of length 2).

Bootstrapped on ppc-darwin.

Attachment: ChangeLog
Description: application/text

Index: tuple
===================================================================
--- tuple	(revision 107569)
+++ tuple	(working copy)
@@ -45,7 +45,7 @@
 {
  // An implementation specific class which is used in the tuple class
  // when the tuple is not maximum possible size.
- struct _NullClass { };
+ struct _NullClass;
 
  template<typename _Tp0 = _NullClass, typename _Tp1 = _NullClass,
           typename _Tp2 = _NullClass, typename _Tp3 = _NullClass,