Fix one of the tests that fails on the "x86 OpenBSD trunk" buildbot, due

to that id() may return a long on a 32-bit box now.  On a box that assigns
addresses "with the sign bit set", id() always returns a long now.

Lib/test/test_genexps.py

@@ -129,7 +129,7 @@ Verify late binding for the innermost for-expression
 Verify re-use of tuples (a side benefit of using genexps over listcomps)
 
     >>> tupleids = map(id, ((i,i) for i in xrange(10)))
-    >>> max(tupleids) - min(tupleids)
+    >>> int(max(tupleids) - min(tupleids))
     0
 
 Verify that syntax error's are raised for genexps used as lvalues