Don't use GTK_WIDGET_*SET_FLAGS (wid, GTK_REALIZED)

Use new API instead: gtk_widget_set_realized ()

https://bugzilla.gnome.org/show_bug.cgi?id=69872

gtk/gtkexpander.c

@@ -403,7 +403,7 @@ gtk_expander_realize (GtkWidget *widget)
   gint label_height;
 
   priv = GTK_EXPANDER (widget)->priv;
-  GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
+  gtk_widget_set_realized (widget, TRUE);
 
   border_width = GTK_CONTAINER (widget)->border_width;