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/structseq.c b/Objects/structseq.c
index 808f938..54c8deb 100644
--- a/Objects/structseq.c
+++ b/Objects/structseq.c
@@ -440,7 +440,7 @@
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
- 0, /* tp_compare */
+ 0, /* tp_reserved */
(reprfunc)structseq_repr, /* tp_repr */
0, /* tp_as_number */
&structseq_as_sequence, /* tp_as_sequence */