[dia] Don't use deprecated macro GTK_CLASS_TYPE.

[Hans Breuer <hans src gnome org>]

commit a45eebcede608ef7a4c0680655d5a4fc52a2c1f7
Author: Adam Buchbinder <adam buchbinder gmail com>
Date:   Mon May 4 13:36:21 2009 -0400

    Don't use deprecated macro GTK_CLASS_TYPE.
    
    Replaced GTK_CLASS_TYPE with G_TYPE_FROM_CLASS:
    http://library.gnome.org/devel/gtk/stable/gtk-Types.html#GTK-CLASS-TYPE--CAPS
    
    Signed-off-by: Adam Buchbinder <adam buchbinder gmail com>
    Signed-off-by: Hans Breuer <hans breuer org>
---
 app/diapagelayout.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/app/diapagelayout.c b/app/diapagelayout.c
index 75c2441..dc2eae4 100644
--- a/app/diapagelayout.c
+++ b/app/diapagelayout.c
@@ -117,7 +117,7 @@ dia_page_layout_class_init(DiaPageLayoutClass *class)
   pl_signals[CHANGED] =
     gtk_signal_new("changed",
 		   GTK_RUN_FIRST,
-		   GTK_CLASS_TYPE (object_class),
+		   G_TYPE_FROM_CLASS (object_class),
 		   GTK_SIGNAL_OFFSET(DiaPageLayoutClass, changed),
 		   gtk_signal_default_marshaller,
 		   GTK_TYPE_NONE, 0);