Reference:
  <http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10434>

OK, the attached patch fixes the two spurious failures of GCC forced into
Tru64 mode.  About time I'd say.

But I'm not sure whether we should apply this without first testing it
on a real Tru64 compiler, lest we cause a real regression just to fix a
spurious failure.  Thoughts?

Regards,
  Stefano