Fix ifdef

Author: mattia-moffa

tls/client-tls13-certauth-c2s.c

@@ -49,7 +49,7 @@
 #define KEY_FILE  "../certs/client-key.pem"
 #define CA_FILE   "../certs/ca-cert.pem"
 
-#if defined(WOLFSSL_TLS13)
+#if defined(WOLFSSL_TLS13) && defined(HAVE_SECRET_CALLBACK)
 
 #ifndef WOLFSSL_SSLKEYLOGFILE_OUTPUT
     #define WOLFSSL_SSLKEYLOGFILE_OUTPUT "sslkeylog.log"