2004-09-30  Paolo Carlini  <pcarlini@suse.de>

	PR libstdc++/10975 (DR 453)
	* include/bits/sstream.tcc (seekoff): Don't fail if __beg == 0
	and __off == 0.
	* docs/html/ext/howto.html: Add an entry for DR 453.
	* testsuite/27_io/basic_stringbuf/seekoff/char/10975.cc: New.
	* testsuite/27_io/basic_stringbuf/seekoff/wchar_t/10975.cc: Likewise.
	* testsuite/27_io/basic_istream/tellg/char/1.cc: Tweak consistently.
	* testsuite/27_io/basic_ostream/tellp/char/1.cc: Likewise.
	* testsuite/27_io/basic_ostream/tellp/char/2.cc: Likewise.
	* testsuite/27_io/basic_istream/seekg/char/2346-fstream.cc: Fix and
	move to...
	* testsuite/27_io/basic_istream/seekp/char/2346-fstream.cc: ... here.
	* testsuite/27_io/basic_istream/seekg/char/2346-sstream.cc: Fix and
	move to...
	* testsuite/27_io/basic_istream/seekp/char/2346-sstream.cc: ... here.

From-SVN: r88341