Issue #1717: rename tp_compare to tp_reserved.  I'll change the
type of tp_compare in a separate commit, for ease of reversion
should things go wrong.
diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index 16ce542..85e87d7 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -490,7 +490,7 @@
 	0,					/* tp_print */
 	0,					/* tp_getattr */
 	0,					/* tp_setattr */
-	0,					/* tp_compare */
+	0,					/* tp_reserved */
 	(reprfunc)stdprinter_repr,		/* tp_repr */
 	0,					/* tp_as_number */
 	0,					/* tp_as_sequence */