OS X Leopard, it turns out, has a new and exciting strategy for

addressing X displays. Update PuTTY's display-name-to-Unix-socket-
path translation code to cope with it, thus causing X forwarding to
start working again on Leopard.

[originally from svn r8020]

windows/winnet.c

@@ -1637,7 +1637,8 @@ int net_service_lookup(char *service)
 	return 0;
 }
 
-SockAddr platform_get_x11_unix_address(int displaynum, char **canonicalname)
+SockAddr platform_get_x11_unix_address(const char *display, int displaynum,
+				       char **canonicalname)
 {
     SockAddr ret = snew(struct SockAddr_tag);
     memset(ret, 0, sizeof(struct SockAddr_tag));