Fix the C definition of the sys._debugmallocstats() function: the function has
no parameter
diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index 177b92e..7be8c9c 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -665,6 +665,9 @@
         ret, out, err = assert_python_ok(*args)
         self.assertIn(b"free PyDictObjects", err)
 
+        # The function has no parameter
+        self.assertRaises(TypeError, sys._debugmallocstats, True)
+
     @unittest.skipUnless(hasattr(sys, "getallocatedblocks"),
                          "sys.getallocatedblocks unavailable on this build")
     def test_getallocatedblocks(self):