Fix test to work when path::native() returns wstring

	* testsuite/27_io/filesystem/path/itr/traversal.cc: Fix test for
	mingw.

From-SVN: r267089

libstdc++-v3/ChangeLog

 2018-12-13  Jonathan Wakely  <jwakely@redhat.com>
 
+	* testsuite/27_io/filesystem/path/itr/traversal.cc: Fix test for
+	mingw.
+
 	* testsuite/27_io/filesystem/path/construct/80762.cc: Skip test if
 	the Filesystem TS support is not configured.
 	* testsuite/experimental/filesystem/path/construct/80762.cc: Likewise.

libstdc++-v3/testsuite/27_io/filesystem/path/itr/traversal.cc

@@ -144,13 +144,13 @@ test04()
   auto it = p.begin();
   std::advance(it, 1);
   VERIFY( std::distance(p.begin(), it) == 1 );
-  VERIFY( it->native() == "a" );
+  VERIFY( it->string() == "a" );
   std::advance(it, 3);
   VERIFY( std::distance(p.begin(), it) == 4 );
-  VERIFY( it->native() == "d" );
+  VERIFY( it->string() == "d" );
   std::advance(it, -2);
   VERIFY( std::distance(p.begin(), it) == 2 );
-  VERIFY( it->native() == "b" );
+  VERIFY( it->string() == "b" );
 }
 
 int