ui/vnc: Use qcrypto_tls_creds_check_endpoint()

Avoid accessing QCryptoTLSCreds internals by using
the qcrypto_tls_creds_check_endpoint() helper.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

ui/vnc.c

@@ -46,6 +46,7 @@
 #include "qapi/qapi-commands-ui.h"
 #include "ui/input.h"
 #include "crypto/hash.h"
+#include "crypto/tlscreds.h"
 #include "crypto/tlscredsanon.h"
 #include "crypto/tlscredsx509.h"
 #include "crypto/random.h"
@@ -4080,9 +4081,9 @@ void vnc_display_open(const char *id, Error **errp)
         }
         object_ref(OBJECT(vd->tlscreds));
 
-        if (vd->tlscreds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
-            error_setg(errp,
-                       "Expecting TLS credentials with a server endpoint");
+        if (!qcrypto_tls_creds_check_endpoint(vd->tlscreds,
+                                              QCRYPTO_TLS_CREDS_ENDPOINT_SERVER,
+                                              errp)) {
             goto fail;
         }
     }