adjust macro guards around get max fragment

Author: JacobBarthelmeh

src/ssl_sess.c

@@ -747,6 +747,7 @@ long wolfSSL_CTX_set_session_cache_mode(WOLFSSL_CTX* ctx, long mode)
 }
 
 #ifdef OPENSSL_EXTRA
+#ifdef HAVE_MAX_FRAGMENT
 /* return the max fragment size set when handshake was negotiated */
 uint8_t wolfSSL_SESSION_get_max_fragment_length(WOLFSSL_SESSION* session)
 {
@@ -756,6 +757,7 @@ uint8_t wolfSSL_SESSION_get_max_fragment_length(WOLFSSL_SESSION* session)
 
     return session->mfl;
 }
+#endif
 
 
 /* Get the session cache mode for CTX

wolfssl/internal.h

@@ -4433,7 +4433,7 @@ struct WOLFSSL_SESSION {
 #ifdef HAVE_EX_DATA
     WOLFSSL_CRYPTO_EX_DATA ex_data;
 #endif
-#ifdef OPENSSL_EXTRA
+#ifdef HAVE_MAX_FRAGMENT
     byte               mfl; /* max fragment length negotiated i.e.
                              * WOLFSSL_MFL_2_8  (6) */
 #endif