[gtk+] Use cairo_surface_destroy instead of g_object_unref

[Kristian Rietveld <kristian src gnome org>]

commit 47969615b230a835a76e5e847099bb0e31e98c46
Author: Kristian Rietveld <kris gtk org>
Date:   Sat Oct 16 20:16:19 2010 +0200

    Use cairo_surface_destroy instead of g_object_unref

 demos/gtk-demo/drawingarea.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/demos/gtk-demo/drawingarea.c b/demos/gtk-demo/drawingarea.c
index b0b760a..4af4cae 100644
--- a/demos/gtk-demo/drawingarea.c
+++ b/demos/gtk-demo/drawingarea.c
@@ -193,7 +193,7 @@ close_window (void)
   window = NULL;
 
   if (surface)
-    g_object_unref (surface);
+    cairo_surface_destroy (surface);
   surface = NULL;
 }