Compiling with DEBUG

In order for me to make sense of this library and maybe build with MSVC/clang-cl (fat chance!?), I added -DDEBUG to my CFLAGS. This caused this compile error in extensions.c:

extensions.c:220:51: error: 'internals_st {aka struct <anonymous>}' has no member named 'extensions_sent_size'
                 for (i = 0; i < session->internals.extensions_sent_size;
                                                   ^
In file included from str.h:28:0,
                 from gnutls_int.h:263,
                 from extensions.c:29:
extensions.c:225:68: error: 'internals_st {aka struct <anonymous>}' has no member named 'extensions_sent'
                              gnutls_ext_get_name(session->internals.
                                                                    ^

I'm not sure if this a fix, but at least it compiles:

--- a/extensions.c 2017-08-15 09:16:32
+++ b/extensions.c 2017-08-16 18:16:26
@@ -207,14 +207,12 @@
        int i;

        if (session->security_parameters.entity == GNUTLS_CLIENT)
-               for (i = 0; i < session->internals.extensions_sent_size;
+               for (i = 0; i < session->internals.rexts_size;
                     i++) {
+                       ext = &session->internals.rexts[i];
                        _gnutls_handshake_log
                            ("EXT[%d]: expecting extension '%s'\n",
-                            session,
-                            gnutls_ext_get_name(session->internals.
-                                                       extensions_sent
-                                                       [i]));
+                            i, gnutls_ext_get_name(ext->type));
                }
 #endif

Has anybody really built this package using MSVC?