[gtk+] gtkplacessidebar: clean up trash row on destroy

[Carlos Soriano Sánchez <csoriano src gnome org>]

commit 377ac909b7919a12109b4dfb0877589afbbd5a46
Author: Carlos Soriano <csoriano gnome org>
Date:   Fri Feb 26 11:01:38 2016 +0100

    gtkplacessidebar: clean up trash row on destroy
    
    Track with a weak ref the trash row, so we can clean up the data in the
    private struct.
    
    Spotted and reviewed by Christian Hergert.

 gtk/gtkplacessidebar.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkplacessidebar.c b/gtk/gtkplacessidebar.c
index ba8d3c0..6160504 100644
--- a/gtk/gtkplacessidebar.c
+++ b/gtk/gtkplacessidebar.c
@@ -994,6 +994,7 @@ update_places (GtkPlacesSidebar *sidebar)
                                       _("Trash"), icon, mount_uri,
                                       NULL, NULL, NULL, 0,
                                       _("Open the trash"));
+      g_object_add_weak_pointer (G_OBJECT (sidebar->trash_row), &sidebar->trash_row);
       g_object_unref (icon);
     }
 
@@ -4041,6 +4042,12 @@ gtk_places_sidebar_dispose (GObject *object)
       g_clear_object (&sidebar->trash_monitor);
     }
 
+  if (sidebar->trash_row)
+    {
+      g_object_remove_weak_pointer (G_OBJECT (sidebar->trash_row), &sidebar->trash_row);
+      sidebar->trash_row = NULL;
+    }
+
   if (sidebar->volume_monitor != NULL)
     {
       g_signal_handlers_disconnect_by_func (sidebar->volume_monitor,