no need to check s->server as default_nid is never used for TLS 1.2 client authentication

ssl/t1_lib.c

diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index 4553468..eb6aa55 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -3482,7 +3482,7 @@
 		 * have set preferred signature algorithms check we support
 		 * sha1.
 		 */
-		if (s->server && default_nid > 0 && c->conf_sigalgs)
+		if (default_nid > 0 && c->conf_sigalgs)
 			{
 			size_t j;
 			const unsigned char *p = c->conf_sigalgs;