[patch] Fix warnings using gcc-4.5 HEAD

[Eli Zaretskii]

> Date: Sat, 11 Jul 2009 10:39:28 +0200
> From: Jan Kratochvil <jan.kratochvil@redhat.com>
> Cc: gdb-patches@sourceware.org
> 
> There is no way how to extend 3rd party enum X definition:
> error: nested redefinition of ‘enum X’
> error: redeclaration of ‘enum X’

Aren't there ways of cleaning this up other than extending existing
enum definitions?