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/Modules/operator.c b/Modules/operator.c
index 9a1efb2..0ba8b09 100644
--- a/Modules/operator.c
+++ b/Modules/operator.c
@@ -334,7 +334,7 @@
 	0,				/* tp_print */
 	0,				/* tp_getattr */
 	0,				/* tp_setattr */
-	0,				/* tp_compare */
+	0,				/* tp_reserved */
 	0,				/* tp_repr */
 	0,				/* tp_as_number */
 	0,				/* tp_as_sequence */
@@ -508,7 +508,7 @@
 	0,				/* tp_print */
 	0,				/* tp_getattr */
 	0,				/* tp_setattr */
-	0,				/* tp_compare */
+	0,				/* tp_reserved */
 	0,				/* tp_repr */
 	0,				/* tp_as_number */
 	0,				/* tp_as_sequence */
@@ -639,7 +639,7 @@
 	0,				/* tp_print */
 	0,				/* tp_getattr */
 	0,				/* tp_setattr */
-	0,				/* tp_compare */
+	0,				/* tp_reserved */
 	0,				/* tp_repr */
 	0,				/* tp_as_number */
 	0,				/* tp_as_sequence */