[gtk+] dnd: Make dest side safe against destroy

[Matthias Clasen <matthiasc src gnome org>]

commit f2cfe9ed74ae222fd0f61f09e85972cbc3ad9917
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Jan 29 23:45:28 2015 -0500

    dnd: Make dest side safe against destroy
    
    Use a weak pointer to clean up when the current drag destination
    gets destroyed.

 gtk/gtkdnd.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkdnd.c b/gtk/gtkdnd.c
index 90e53bf..8ee832f 100644
--- a/gtk/gtkdnd.c
+++ b/gtk/gtkdnd.c
@@ -1926,6 +1926,7 @@ gtk_drag_find_widget (GtkWidget           *widget,
                 }
 
               info->widget = widget;
+              g_object_add_weak_pointer (G_OBJECT (widget), (gpointer *) &info->widget);
             }
         }
 
@@ -3577,7 +3578,6 @@ _gtk_drag_source_handle_event (GtkWidget *widget,
     case GDK_DRAG_STATUS:
       {
         GdkCursor *cursor;
-
         if (info->proxy_dest)
           {
             if (!event->dnd.send_event)