[gimp] app: use the new GtkScrollable API instead of deprecated tree view API

[Michael Natterer <mitch src gnome org>]

commit 23e3ae8fbeda0bd2f14db0ec16e51301519ea846
Author: Michael Natterer <mitch gimp org>
Date:   Fri Oct 22 17:17:27 2010 +0200

    app: use the new GtkScrollable API instead of deprecated tree view API

 app/widgets/gimpcontainertreeview-dnd.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/widgets/gimpcontainertreeview-dnd.c b/app/widgets/gimpcontainertreeview-dnd.c
index d32507a..a414838 100644
--- a/app/widgets/gimpcontainertreeview-dnd.c
+++ b/app/widgets/gimpcontainertreeview-dnd.c
@@ -224,7 +224,7 @@ gimp_container_tree_view_scroll_timeout (gpointer data)
   GtkAdjustment         *adj;
   gdouble                new_value;
 
-  adj = gtk_tree_view_get_vadjustment (GTK_TREE_VIEW (tree_view->view));
+  adj = gtk_scrollable_get_vadjustment (GTK_SCROLLABLE (tree_view->view));
 
 #ifdef SCROLL_DEBUG
   g_print ("scroll_timeout: scrolling by %d\n", SCROLL_STEP);