[gtk+/gtk-2-18] Disconnect signal handlers on adjustment in destroy handler

[Matthias Clasen <matthiasc src gnome org>]

commit 71cef6c8a0ec3d5e5d9d7ebf05be956efb45bf7b
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.
    (cherry picked from commit ff1343a594383e0d88b1aecdf34025dd3ee36ed6)

 gtk/gtkscrolledwindow.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkscrolledwindow.c b/gtk/gtkscrolledwindow.c
index e1ef633..fdc30b9 100644
--- a/gtk/gtkscrolledwindow.c
+++ b/gtk/gtkscrolledwindow.c
@@ -852,6 +852,9 @@ 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);
@@ -859,6 +862,9 @@ 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);