menuitem: deprecate toggle-spacing style property

We can move this to just use the actual GtkCssGadget of the menu item.

gtk/gtkcheckmenuitemprivate.h

@@ -0,0 +1,32 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GTK_CHECK_MENU_ITEM_PRIVATE_H__
+#define __GTK_CHECK_MENU_ITEM_PRIVATE_H__
+
+#include <gtk/gtkcheckmenuitem.h>
+#include <gtk/gtkcssgadgetprivate.h>
+
+G_BEGIN_DECLS
+
+void       _gtk_check_menu_item_set_active       (GtkCheckMenuItem *check_menu_item,
+                                                  gboolean          is_active);
+GtkCssGadget * _gtk_check_menu_item_get_indicator_gadget (GtkCheckMenuItem *check_menu_item);
+
+G_END_DECLS
+
+#endif /* __GTK_CHECK_MENU_ITEM_PRIVATE_H__ */