libstdc++/9875: filebuf doesn't handle codecvt::encoding() > 1

[paolo@gcc.gnu.org]

Synopsis: filebuf doesn't handle codecvt::encoding() > 1

Responsible-Changed-From-To: unassigned->paolo
Responsible-Changed-By: paolo
Responsible-Changed-When: Fri Feb 28 22:55:07 2003
Responsible-Changed-Why:
    Patching.
State-Changed-From-To: open->closed
State-Changed-By: paolo
State-Changed-When: Fri Feb 28 22:55:07 2003
State-Changed-Why:
    Confirmed.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9875