MT#55831 Use a proper accessor instead of messing with the struc directly

Use a proper accessor instead of messing with the struc directly
which has become opaque in latest OpenSSL versions.
(real ticket number: TT#12308)

Change-Id: I51855e46f07f2331ad281a94961ca1d7394dc0de

apps/diameter_client/lib_dbase/tcp_comm.c

@@ -74,7 +74,7 @@ long tcp_ssl_dbg_cb(BIO *bio, int oper, const char *argp,
   switch (oper) {
   case BIO_CB_WRITE: {
     char buf[256];
-    snprintf(buf, 256, "%s: %s", argp, bio->method->name);
+    snprintf(buf, 256, "%s: %s", argp, BIO_method_name(bio));
     INFO("%s", buf);
   } break;