[gcompris] fixed focus issue on windows

[Bruno Coudoin <bcoudoin src gnome org>]

commit f298207fb68dc3d16572ece4eed0525eb4d9db9c
Author: Bruno Coudoin <bruno coudoin free fr>
Date:   Thu Aug 15 08:23:07 2013 +0200

    fixed focus issue on windows
    
    When the activation code is requested, it kept the focus
    even after it was destroyed. Thus 'spaces' and 'enters'
    was not received by GCompris activities.

 src/gcompris/gcompris.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/gcompris/gcompris.c b/src/gcompris/gcompris.c
index bb6ca29..4d649fa 100644
--- a/src/gcompris/gcompris.c
+++ b/src/gcompris/gcompris.c
@@ -1067,6 +1067,7 @@ activation_done()
     }
 
   gc_board_play( get_board_to_start());
+  gtk_widget_grab_focus(GTK_WIDGET(canvas));
   goo_canvas_item_remove (activation_item);
 }
 #endif