[gnome-remote-desktop] credentials-libsecret: Do not crash, when deleting legacy VNC password

[Jonas Ådahl <jadahl src gnome org>]

commit b1c0acbe9f6d3cb60f09935bee05dacf7e255a95
Author: Pascal Nowack <Pascal Nowack gmx de>
Date:   Tue Aug 2 06:37:35 2022 +0200

    credentials-libsecret: Do not crash, when deleting legacy VNC password
    
    While unlikely, there is no guarantee, that the legacy VNC password
    still exists, when clearing it during the migration process.
    So, protect against a crash here by checking whether an error was
    actually set.

 src/grd-credentials-libsecret.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/grd-credentials-libsecret.c b/src/grd-credentials-libsecret.c
index 72530cba..48bfe635 100644
--- a/src/grd-credentials-libsecret.c
+++ b/src/grd-credentials-libsecret.c
@@ -203,7 +203,8 @@ maybe_migrate_legacy_vnc_password (GrdCredentials *credentials)
       else
         {
           if (!secret_password_clear_sync (GRD_VNC_LEGACY_PASSWORD_SCHEMA,
-                                           NULL, &error, NULL))
+                                           NULL, &error, NULL) &&
+              error)
             {
               g_printerr ("Failed to clear VNC password from old schema: %s\n",
                           error->message);