[v3] fix libstdc++/9827

[Benjamin Kosnik]

>2003-02-25  Jerry Quinn  <jlquinn@optonline.net>
>
>        * include/bits/streambuf_iterator.h (_M_put): Set _M_failed if sputn
>          fails.
>	* testsuite/27_io/ostream_fail.cc: New test.

This is good everywhere.

thanks,
benjamin