[gnome-builder] helper: fix ref transfer to task

[Christian Hergert <chergert src gnome org>]

commit bdfe6fba97290a86f0ecfcc045ed34b6a339a6dc
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jan 31 19:48:28 2018 -0800

    helper: fix ref transfer to task
    
    This was fallout from fixing the code-style for ownership
    transfer in async functions.

 src/plugins/beautifier/gb-beautifier-helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/plugins/beautifier/gb-beautifier-helper.c b/src/plugins/beautifier/gb-beautifier-helper.c
index 84047dfa3..8558b63dc 100644
--- a/src/plugins/beautifier/gb-beautifier-helper.c
+++ b/src/plugins/beautifier/gb-beautifier-helper.c
@@ -160,7 +160,7 @@ gb_beautifier_helper_create_tmp_file_cb (GObject      *object,
   if (g_task_return_error_if_cancelled (task))
     g_file_delete (file, NULL, NULL);
   else
-    g_task_return_pointer (task, g_steal_pointer (&file), g_object_unref);
+    g_task_return_pointer (task, g_object_ref (file), g_object_unref);
 }
 
 void