[gtk+] demos: Update testpixbuf-scale demo for adjustment sealing

[Benjamin Otte <otte src gnome org>]

commit c731e1ce0a7857e504c3c190ce1fe9741b6f9dde
Author: Benjamin Otte <otte redhat com>
Date:   Wed Jan 5 22:14:32 2011 +0100

    demos: Update testpixbuf-scale demo for adjustment sealing

 demos/testpixbuf-scale.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/demos/testpixbuf-scale.c b/demos/testpixbuf-scale.c
index ee57763..bfff451 100644
--- a/demos/testpixbuf-scale.c
+++ b/demos/testpixbuf-scale.c
@@ -24,9 +24,9 @@ set_interp_type (GtkWidget *widget, gpointer data)
 void
 overall_changed_cb (GtkAdjustment *adjustment, gpointer data)
 {
-  if (adjustment->value != overall_alpha)
+  if (gtk_adjustment_get_value (adjustment) != overall_alpha)
     {
-      overall_alpha = adjustment->value;
+      overall_alpha = gtk_adjustment_get_value (adjustment);
       gtk_widget_queue_draw (darea);
     }
 }