[gtk+] Substitute gtk_style_unref for g_object_unref in documentation example

[Javier Jardón <jjardon src gnome org>]

commit b66583f2a59e09ad9f27f1750b58917b243381ae
Author: Javier Jardón <javierjc1982 gmail com>
Date:   Mon Oct 12 16:09:55 2009 +0200

    Substitute gtk_style_unref for g_object_unref in documentation example
    
    https://bugzilla.gnome.org/show_bug.cgi?id=598218

 docs/tutorial/gtk_tut.sgml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/docs/tutorial/gtk_tut.sgml b/docs/tutorial/gtk_tut.sgml
index af812b8..003f4c7 100644
--- a/docs/tutorial/gtk_tut.sgml
+++ b/docs/tutorial/gtk_tut.sgml
@@ -16978,7 +16978,7 @@ gtk_dial_expose (GtkWidget      *widget,
                     points, 5,
                     FALSE);
 
-  gtk_style_unref(blankstyle);
+  g_object_unref(blankstyle);
 
 
   /* Draw ticks */