[gtk+] gtk-demo: Fix copy/paste error

[Benjamin Otte <otte src gnome org>]

commit 07a69b724748ed8f1166ece34e15aa387bb2f674
Author: Benjamin Otte <otte redhat com>
Date:   Sun Mar 20 05:32:35 2016 +0100

    gtk-demo: Fix copy/paste error
    
    http://www.viva64.com/en/b/0383/

 demos/gtk-demo/offscreen_window2.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/demos/gtk-demo/offscreen_window2.c b/demos/gtk-demo/offscreen_window2.c
index 5c16c40..a9d1687 100644
--- a/demos/gtk-demo/offscreen_window2.c
+++ b/demos/gtk-demo/offscreen_window2.c
@@ -345,7 +345,7 @@ gtk_mirror_bin_get_preferred_height (GtkWidget *widget,
 
   gtk_mirror_bin_size_request (widget, &requisition);
 
-  *minimum = *natural = requisition.width;
+  *minimum = *natural = requisition.height;
 }
 
 static void