Fix for Windows: close a temporary file before trying to delete it.

Author: hyeshik

Lib/test/test_multibytecodec.py

@@ -143,6 +143,8 @@ def test_bug1728403(self):
             f = codecs.open(TESTFN, encoding='cp949')
             self.assertRaises(UnicodeDecodeError, f.read, 2)
         finally:
+            try: f.close()
+            except: pass
             os.unlink(TESTFN)
 
 class Test_StreamWriter(unittest.TestCase):