Fix sizeof test.

Author: serhiy-storchaka

Lib/test/test_sys.py

@@ -1336,7 +1336,8 @@ def delx(self): del self.__x
         # PyCapsule
         # XXX
         # rangeiterator
-        check(iter(range(1)), size('4l'))
+        check(iter(range(1)), size('3l'))
+        check(iter(range(2**65)), size('3P'))
         # reverse
         check(reversed(''), size('nP'))
         # range