[gtkmm-documentation/gmenu] MainMenu example: Use change_state(), not set_state().

[Murray Cumming <murrayc src gnome org>]

commit 695466fb2e6f0e1c27e5ecdd58ed1c1d5858a06a
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Aug 9 11:55:11 2013 +0200

    MainMenu example: Use change_state(), not set_state().
    
    Action::set_state() should probably be private.

 examples/book/menus/main_menu/examplewindow.cc |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/examples/book/menus/main_menu/examplewindow.cc b/examples/book/menus/main_menu/examplewindow.cc
index 24b02ed..2f0ed1c 100644
--- a/examples/book/menus/main_menu/examplewindow.cc
+++ b/examples/book/menus/main_menu/examplewindow.cc
@@ -231,7 +231,7 @@ void ExampleWindow::on_menu_others()
 void ExampleWindow::on_menu_choices(const Glib::ustring& parameter)
 {
   //The radio action's state does not change automatically:
-  m_refChoice->set_state(
+  m_refChoice->change_state(
     Glib::Variant<Glib::ustring>::create(parameter) );
   
   Glib::ustring message;
@@ -246,7 +246,7 @@ void ExampleWindow::on_menu_choices(const Glib::ustring& parameter)
 void ExampleWindow::on_menu_choices_other(int parameter)
 {
   //The radio action's state does not change automatically:
-  m_refChoice->set_state(
+  m_refChoice->change_state(
    Glib::Variant<int>::create(parameter) );
 
   Glib::ustring message;
@@ -264,7 +264,7 @@ void ExampleWindow::on_menu_toggle()
   m_refToggle->get_state(active);
 
   //The toggle action's state does not change automatically:
-  m_refToggle->set_state(
+  m_refToggle->change_state(
    Glib::Variant<bool>::create(!active) );
   active = !active;