2002-10-27  Paolo Carlini  <pcarlini@unitus.it>

	PR libstdc++/8347
	* include/bits/basic_string.tcc
	(string::_S_construct(_InIter, _InIter, const _Alloc&,
	forward_iterator_tag)): Do not throw logic error if
	__beg == NULL && __end == __beg.
	(string::string(const _CharT*, const _Alloc&)): Tweak.
	* testsuite/21_strings/ctor_copy_dtor.cc: Add test05 from PR.

From-SVN: r58577