* testsuite/22_locale/codecvt_members_char_char.cc: Do not
	allow NULL argument to be passed to setenv().
	* testsuite/22_locale/codecvt_members_wchar_t_char.cc: Likewise.
	* testsuite/22_locale/collate_members_char.cc: Likewise.
	* testsuite/22_locale/collate_members_wchar_t.cc: Likewise.
	* testsuite/22_locale/ctype_members_char.cc: Likewise.
	* testsuite/22_locale/ctype_members_wchar_t.cc: Likewise.
	* testsuite/22_locale/messages_members_char.cc: Likewise.
	* testsuite/22_locale/money_get_members_char.cc: Likewise.
	* testsuite/22_locale/money_get_members_wchar_t.cc: Likewise.
	* testsuite/22_locale/money_put_members_char.cc: Likewise.
	* testsuite/22_locale/money_put_members_wchar_t.cc: Likewise.
	* testsuite/22_locale/moneypunct_members_char.cc: Likewise.
	* testsuite/22_locale/moneypunct_members_wchar_t.cc: Likewise.
	* testsuite/22_locale/num_get_members_char.cc: Likewise.
	* testsuite/22_locale/num_get_members_wchar_t.cc: Likewise.
	* testsuite/22_locale/num_put_members_char.cc: Likewise.
	* testsuite/22_locale/num_put_members_wchar_t.cc: Likewise.
	* testsuite/22_locale/numpunct_members_char.cc: Likewise.
	* testsuite/22_locale/numpunct_members_wchar_t.cc: Likewise.
	* testsuite/22_locale/time_get_members_char.cc: Likewise.
	* testsuite/22_locale/time_get_members_wchar_t.cc: Likewise.
	* testsuite/22_locale/time_put_members_char.cc: Likewise.
	* testsuite/22_locale/time_put_members_wchar_t.cc: Likewise.

From-SVN: r49384