re PR libstdc++/47321 (FAIL: 21_strings/basic_string/requirements/typedefs.cc (test for excess errors))

2011-01-16  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/47321
	* testsuite/21_strings/basic_string/requirements/typedefs.cc:
	Only test std::wstring when _GLIBCXX_USE_WCHAR_T is defined.

From-SVN: r168871