2003-05-07  Paolo Carlini  <pcarlini@unitus.it>

	* include/std/std_fstream.h (_M_is_indeterminate): Remove.
	* src/fstream.cc
	(basic_filebuf<char/wchar_t>::_M_underflow): Simplify: either
	there is no buffer or __testget == !__testinit.

	* src/fstream.cc
	(basic_filebuf<char/wchar_t>::_M_underflow): _M_set_determinate()
	automatically sets, if appropriate, _M_out_cur == _M_in_cur.

	* include/std/std_fstream.h (_M_destroy_pback): Don't set
	unnecessarily _M_pback_cur_save and _M_pback_end_save.

	* include/std/std_fstream.h (_M_set_determinate): Minor tweak.

	* include/std/std_sstream.h (_M_sync): Minor tweak.

	* include/bits/fstream.tcc (close): No need to call
	_M_destroy_pback, setting _M_pback_init to false suffices
	to clean up.

From-SVN: r66557