[gtk+/native-layout] Disconnect signal handlers on adjustment in destroy handler

[Tristan Van Berkom <tvb src gnome org>]

commit 71d7b97a90a5ecdbeca5ead6d7dfe6cdcd6d704c
Author: Benjamin Otte <otte gnome org>
Date:   Sat Dec 19 13:46:18 2009 +0100

    Disconnect signal handlers on adjustment in destroy handler
    
    Not removing the signal handler caused crashes if the adjustment
    survived longer than the scrolled window and still emitted signals. This
    could happen inside WebKit.

 gtk/gtkscrolledwindow.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkscrolledwindow.c b/gtk/gtkscrolledwindow.c
index 0101f47..718bc45 100644
--- a/gtk/gtkscrolledwindow.c
+++ b/gtk/gtkscrolledwindow.c
@@ -858,6 +858,9 @@ gtk_scrolled_window_destroy (GtkObject *object)
 
   if (scrolled_window->hscrollbar)
     {
+      g_signal_handlers_disconnect_by_func (gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)),
+					    gtk_scrolled_window_adjustment_changed,
+					    scrolled_window);
       gtk_widget_unparent (scrolled_window->hscrollbar);
       gtk_widget_destroy (scrolled_window->hscrollbar);
       g_object_unref (scrolled_window->hscrollbar);
@@ -865,6 +868,9 @@ gtk_scrolled_window_destroy (GtkObject *object)
     }
   if (scrolled_window->vscrollbar)
     {
+      g_signal_handlers_disconnect_by_func (gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar)),
+					    gtk_scrolled_window_adjustment_changed,
+					    scrolled_window);
       gtk_widget_unparent (scrolled_window->vscrollbar);
       gtk_widget_destroy (scrolled_window->vscrollbar);
       g_object_unref (scrolled_window->vscrollbar);