[gtk+] gtkdnd: Disconnect GdkDragContext signals on gtk_drag_source_info_free()

[Carlos Garnacho <carlosg src gnome org>]

commit 261622733c9e30fee08a14623fa970020ead9436
Author: Carlos Garnacho <carlosg gnome org>
Date:   Wed Jan 20 18:53:03 2016 +0100

    gtkdnd: Disconnect GdkDragContext signals on gtk_drag_source_info_free()
    
    Otherwise it may still be tricked into emitting further signals at a
    time we've already destroyed the GtkDragSourceInfo passed as callback
    user data.

 gtk/gtkdnd.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkdnd.c b/gtk/gtkdnd.c
index 6c60fed..b31b5c5 100644
--- a/gtk/gtkdnd.c
+++ b/gtk/gtkdnd.c
@@ -3206,6 +3206,19 @@ gtk_drag_source_info_free (GtkDragSourceInfo *info)
 static void
 gtk_drag_source_info_destroy (GtkDragSourceInfo *info)
 {
+  g_signal_handlers_disconnect_by_func (info->context,
+                                        gtk_drag_context_drop_performed_cb,
+                                        info);
+  g_signal_handlers_disconnect_by_func (info->context,
+                                        gtk_drag_context_dnd_finished_cb,
+                                        info);
+  g_signal_handlers_disconnect_by_func (info->context,
+                                        gtk_drag_context_cancel_cb,
+                                        info);
+  g_signal_handlers_disconnect_by_func (info->context,
+                                        gtk_drag_context_action_cb,
+                                        info);
+
   g_signal_handlers_disconnect_by_func (info->ipc_widget,
                                         gtk_drag_grab_broken_event_cb,
                                         info);