ssl/s3_[clnt|srvr].c: fix warning and linking error.

PR: 2979

ssl/s3_srvr.c

@@ -1131,6 +1131,7 @@ int ssl3_get_client_hello(SSL *s)
 	 * s->tmp.new_cipher	- the new cipher to use.
 	 */
 
+#ifndef OPENSSL_NO_TLSEXT
 	/* Handles TLS extensions that we couldn't check earlier */
 	if (s->version >= SSL3_VERSION)
 		{
@@ -1140,6 +1141,7 @@ int ssl3_get_client_hello(SSL *s)
 			goto err;
 			}
 		}
+#endif
 
 	if (ret < 0) ret=1;
 	if (0)