[nautilus] file-operations: mark_desktop_file_executable: use automatic cleanup

[Ernestas Kulik <ernestask src gnome org>]

commit 0d207faa308b07425c72391dd0722e2bebd1df5d
Author: Ernestas Kulik <ernestask gnome org>
Date:   Mon May 15 11:21:52 2017 +0300

    file-operations: mark_desktop_file_executable: use automatic cleanup
    
    https://bugzilla.gnome.org/show_bug.cgi?id=782650

 src/nautilus-file-operations.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/src/nautilus-file-operations.c b/src/nautilus-file-operations.c
index d665e61..8d9e0c4 100644
--- a/src/nautilus-file-operations.c
+++ b/src/nautilus-file-operations.c
@@ -8110,7 +8110,7 @@ nautilus_file_mark_desktop_file_executable (GFile              *file,
                                             NautilusOpCallback  done_callback,
                                             gpointer            done_callback_data)
 {
-    GTask *task;
+    g_autoptr (GTask) task = NULL;
     MarkTrustedJob *job;
 
     job = op_job_new (MarkTrustedJob, parent_window);
@@ -8122,7 +8122,6 @@ nautilus_file_mark_desktop_file_executable (GFile              *file,
     task = g_task_new (NULL, NULL, mark_desktop_file_executable_task_done, job);
     g_task_set_task_data (task, job, NULL);
     g_task_run_in_thread (task, mark_desktop_file_executable_task_thread_func);
-    g_object_unref (task);
 }
 
 static void