iphlpapi: Don't rely on the HAVE_XXX macros having a numeric values.

[Alexandre Julliard]

Dan Kegel <dank at kegel.com> writes:

> On Fri, Jun 8, 2012 at 11:51 AM, Francois Gouget <fgouget at free.fr> wrote:
>> On Fri, 8 Jun 2012, Dan Kegel wrote:
>>> Isn't this a no-op?  I thought that an undefined symbol was
>>> treated as false by the preprocessor.
>>
>> Actually you may be right. But then this is the only place in Wine where
>> we rely on this and I see not reason to make this assumption. Even more
>> so since we don't for the other macros in the same test which makes this
>> locally inconsistent.
>
> It feels funny to avoid using a basic feature of C...
> maybe we should remove the extra defined() calls.

It's common practice to avoid it, to make things like -Wundef more useful.

-- 
Alexandre Julliard
julliard at winehq.org