libio.h cleanup (was Re: changes for approval, part three (solaris))

[David Edelsohn]

>>>>> Phil Edwards writes:

Phil> One minor problem:  we can't just add exception specifications (via
Phil> __THROW) to functions, because libio is written in C and compiled as such.
Phil> (That's why the old code had a test for __cplusplus.)

	Sorry, yes, of course.  I had not meant to omit the __cplusplus
test in the revised libio.h definition of __THROW.

David