Make fenv.h FE_* macros usable in #if (bug 3439)

[Joseph S. Myers]

On Wed, 21 Nov 2012, Markus Trippelsdorf wrote:

> On 2012.11.03 at 02:01 +0000, Joseph S. Myers wrote:
> > This patch fixes the remaining part of bug 3439, FE_* constants in
> > fenv.h not being usable in #if, in the same way as my recent fix for
> > math.h constants (as suggested by Paul Eggert in that bug).
> 
> I now get:

Since you don't say what architecture you are on or anything else about 
your test environment (even whether you have confirmed this problem is 
present in the revision of my commit but not the previous revision), this 
is not a useful bug report.

-- 
Joseph S. Myers
joseph@codesourcery.com