[gnome-control-center] object-cache: Avoid use after free of task error

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit f00fd653cb7b8bc33cc84615b1c75ff878c847b0
Author: Barnabás Pőcze <pobrn protonmail com>
Date:   Wed Oct 19 19:42:27 2022 +0200

    object-cache: Avoid use after free of task error
    
    The error should not be touched after passing it to
    `g_task_return_error()` as noted by its documentation:
    
      Note that since the task takes ownership of @error, and since the
      task may be completed before returning from g_task_return_error(),
      you cannot assume that @error is still valid after calling this.
    
    However, previously, the code did try to free error since the
    `local_error` was defined with `g_autoptr(GError)`.

 shell/cc-object-storage.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/shell/cc-object-storage.c b/shell/cc-object-storage.c
index f52ba5960..f9a08f3ab 100644
--- a/shell/cc-object-storage.c
+++ b/shell/cc-object-storage.c
@@ -91,7 +91,7 @@ create_dbus_proxy_in_thread_cb (GTask        *task,
 
   if (local_error)
     {
-      g_task_return_error (task, local_error);
+      g_task_return_error (task, g_steal_pointer (&local_error));
       return;
     }