[COMMITTED PATCH] Add missing #include in get-rounding-mode.h

[Joseph S. Myers]

On Tue, 24 Jun 2014, Roland McGrath wrote:

> The nest of implicit includes is beyond anyone's keeping track of, so
> miscellaneous cleanups can have this effect and it's not a big deal to
> fix it up.  It could well have been someone else's change after yours
> that somehow made the difference.  Everyone should just remember to look
> for warnings.  (It will get much easier to notice them again when we clean
> up the -Wundef fallout.)

Once the -Wundef fallout is resolved, I hope we can move to building with 
-Werror by default (with some suitable policy about using 
-Wno-error=whatever or -Wno-whatever when warnings, possibly depending on 
the compiler version, seem hard to fix - probably including comments about 
what the warnings are and what platforms / GCC versions they are seen 
with, to help guide future review of such -Wno- settings; existing -Wno- 
uses could also do with such review).

-- 
Joseph S. Myers
joseph@codesourcery.com