(widget-checkbox-action): Clear undo info.

lisp/ChangeLog

@@ -1,3 +1,7 @@
+2005-12-17  Martin Rudalics  <rudalics@gmx.at>  (tiny change)
+
+	* wid-edit.el (widget-checkbox-action): Clear undo info.
+
 2005-12-16  Bill Wohler  <wohler@newt.com>
 
 	* menu-bar.el (kill-this-buffer): Set a good example by using menu

lisp/wid-edit.el

@@ -2161,7 +2161,8 @@ when he invoked the menu."
     (when sibling
       (if (widget-value widget)
 	  (widget-apply sibling :activate)
-	(widget-apply sibling :deactivate)))))
+	(widget-apply sibling :deactivate))
+      (widget-clear-undo))))
 
 ;;; The `checklist' Widget.