libstdc++/9423: filebuf::pubsetbuf(0, 0) doesn't turn off buffering if called after open

[paolo@gcc.gnu.org]

Synopsis: filebuf::pubsetbuf(0, 0) doesn't turn off buffering if called after open

State-Changed-From-To: feedback->closed
State-Changed-By: paolo
State-Changed-When: Tue Apr 15 22:46:29 2003
State-Changed-Why:
    Docs updated for 3.3 and 3.4.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9423