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/_cursesmodule.c b/Modules/_cursesmodule.c
index 3764f48..9bc74a6 100644
--- a/Modules/_cursesmodule.c
+++ b/Modules/_cursesmodule.c
@@ -1662,7 +1662,7 @@
 	0,			/*tp_print*/
 	(getattrfunc)0,		/*tp_getattr*/
 	(setattrfunc)0,		/*tp_setattr*/
-	0,			/*tp_compare*/
+	0,			/*tp_reserved*/
 	0,			/*tp_repr*/
 	0,			/*tp_as_number*/
 	0,			/*tp_as_sequence*/