[gtkmm-documentation] InfoBar example: Really show the infobar when it shall be shown

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 79d9b2519539ecd4647b5d0c9a36f58dd45384f8
Author: Kjell Ahlstedt <kjell ahlstedt bredband net>
Date:   Thu Nov 14 15:36:27 2013 +0100

    InfoBar example: Really show the infobar when it shall be shown
    
    * examples/book/infobar/examplewindow.cc: Use show_all() instead of
    show_all_children(). Not sure why this is necessary. I think only
    show_all() will realize the infobar.

 examples/book/infobar/examplewindow.cc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/examples/book/infobar/examplewindow.cc b/examples/book/infobar/examplewindow.cc
index f57cce4..15863f9 100644
--- a/examples/book/infobar/examplewindow.cc
+++ b/examples/book/infobar/examplewindow.cc
@@ -69,7 +69,7 @@ ExampleWindow::ExampleWindow()
   m_refTextBuffer->signal_changed().connect(sigc::mem_fun(*this,
               &ExampleWindow::on_textbuffer_changed) );
 
-  show_all_children();
+  show_all();
 
   // Keep the InfoBar hidden until a message needs to be shown:
   m_InfoBar.hide();