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/zipimport.c b/Modules/zipimport.c
index ae11bde..ba37f8b 100644
--- a/Modules/zipimport.c
+++ b/Modules/zipimport.c
@@ -597,7 +597,7 @@
 	0,					/* tp_print */
 	0,					/* tp_getattr */
 	0,					/* tp_setattr */
-	0,					/* tp_compare */
+	0,					/* tp_reserved */
 	(reprfunc)zipimporter_repr,		/* tp_repr */
 	0,					/* tp_as_number */
 	0,					/* tp_as_sequence */