[gtk-vnc] sasl: Emit vnc-auth-failure signal on SASL auth failures

[Daniel P. Berrange <dberrange src gnome org>]

commit 3f4f79ffbf74f31ae65055c03a8eb523ac631422
Author: Christophe Fergeau <cfergeau redhat com>
Date:   Wed Jan 9 14:01:23 2019 +0100

    sasl: Emit vnc-auth-failure signal on SASL auth failures
    
    When the SASL username or password are wrong, at the moment client
    application will not get any specific notification for it, they will
    just know that the remote connection was closed because of an error.
    
    This commit adds the emission of the vnc-auth-failure signal when
    vnc_connection_perform_auth_sasl() fails.
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1456175
    
    Signed-off-by: Christophe Fergeau <cfergeau redhat com>

 src/vncconnection.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/vncconnection.c b/src/vncconnection.c
index 08dd7ab..d8ecfd0 100644
--- a/src/vncconnection.c
+++ b/src/vncconnection.c
@@ -4419,6 +4419,7 @@ static gboolean vnc_connection_perform_auth_sasl(VncConnection *conn)
  error:
     if (saslconn)
         sasl_dispose(&saslconn);
+    vnc_connection_auth_failure(conn, "Unknown authentication failure");
     return FALSE;
 }
 #endif /* HAVE_SASL */