fixed finally state in distutils.test_util
diff --git a/Lib/distutils/tests/test_util.py b/Lib/distutils/tests/test_util.py
index 4da1e65..55ef160 100644
--- a/Lib/distutils/tests/test_util.py
+++ b/Lib/distutils/tests/test_util.py
@@ -355,7 +355,7 @@
         try:
             self.assertRaises(DistutilsByteCompileError, byte_compile, [])
         finally:
-            sys.dont_write_bytecode = False
+            sys.dont_write_bytecode = old_dont_write_bytecode
 
 def test_suite():
     return unittest.makeSuite(UtilTestCase)