It looks like this comes from r59493 which purports to fix a warning:
------------------------------------------------------------------------
r59493 | christian.heimes | 2007-12-13 23:38:13 -0500 (Thu, 13 Dec 2007)
| 1 line
Fixed warning in ssl module
------------------------------------------------------------------------
--- Modules/_ssl.c (revision 59492)
+++ Modules/_ssl.c (revision 59493)
@@ -660,7 +660,7 @@
char buf[2048];
char *vptr;
int len;
- unsigned char *p;
+ const unsigned char *p;
if (certificate == NULL)
return peer_alt_names;
On MacOS 10.4 with OpenSSL 0.9.7i, ASN1_item_d2i is declared without
const, so reverting fixes the warning.
I guess Christian was developing on a system with a different OpenSSL
version, so we need to hear from him before attempting another fix.