[gnome-control-center] user-panel: Fix possible invalid free

[Felipe Borges <felipeborges src gnome org>]

commit 38d62974b6845197a66f5191fcb05c40f8c112e7
Author: Mohammed Sadiq <sadiq sadiqpk org>
Date:   Sat Aug 13 10:49:21 2022 +0530

    user-panel: Fix possible invalid free
    
    The selected_user variable is unref on dispose(), and show_user()
    is likely executed with self->selected_user already set to user,
    but it's inconsistent, and so to be on the safer side, use
    g_set_object()

 panels/user-accounts/cc-user-panel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/panels/user-accounts/cc-user-panel.c b/panels/user-accounts/cc-user-panel.c
index 52c15b5e0..9b980e80e 100644
--- a/panels/user-accounts/cc-user-panel.c
+++ b/panels/user-accounts/cc-user-panel.c
@@ -828,7 +828,7 @@ show_user (ActUser *user, CcUserPanel *self)
         g_autofree gchar *malcontent_control_path = NULL;
 #endif
 
-        self->selected_user = user;
+        g_set_object (&self->selected_user, user);
 
         setup_avatar_for_user (self->user_avatar, user);
         cc_avatar_chooser_set_user (self->avatar_chooser, user);