[gtk+/gtk-2-24] Ref/sink the GtkFileFilter used for GtkEntryCompletion; it's a GtkObject here

[Federico Mena Quintero <federico src gnome org>]

commit a99752239d6c6e3bf7ea0736048bbce7bb0aa228
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Mar 9 20:57:38 2016 -0600

    Ref/sink the GtkFileFilter used for GtkEntryCompletion; it's a GtkObject here

 gtk/gtkfilechooserentry.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkfilechooserentry.c b/gtk/gtkfilechooserentry.c
index 05c8d88..142dc2b 100644
--- a/gtk/gtkfilechooserentry.c
+++ b/gtk/gtkfilechooserentry.c
@@ -645,6 +645,8 @@ refresh_current_folder_and_file_part (GtkFileChooserEntry *chooser_entry)
       pattern = g_strconcat (chooser_entry->file_part, "*", NULL);
       gtk_file_filter_add_pattern (filter, pattern);
 
+      g_object_ref_sink (filter);
+
       _gtk_file_system_model_set_filter (GTK_FILE_SYSTEM_MODEL (chooser_entry->completion_store),
                                          filter);