fix unused-variable fail without MBEDTLS_DEBUG_C
int mbedtls_ssl_tls13_handshake_server_step( mbedtls_ssl_context *ssl )
{
+ ((void) ssl);
MBEDTLS_SSL_DEBUG_MSG( 2, ( "tls1_3 server state: %d", ssl->state ) );
return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
