[gnome-sudoku] Don't directly call back_cb()

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 2e5802a9964defc3e1cc2909c226c405e63d670e
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sun Sep 28 12:11:02 2014 -0500

    Don't directly call back_cb()

 src/gnome-sudoku.vala |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/src/gnome-sudoku.vala b/src/gnome-sudoku.vala
index ec3cb37..c943cbb 100644
--- a/src/gnome-sudoku.vala
+++ b/src/gnome-sudoku.vala
@@ -291,7 +291,7 @@ public class Sudoku : Gtk.Application
         if (view != null)
             game_box.remove (view);
 
-        back_cb ();
+        show_game_view ();
         game = new SudokuGame (board);
 
         headerbar.title = board.difficulty_category.to_string ();
@@ -403,7 +403,7 @@ public class Sudoku : Gtk.Application
         dialog.show ();
     }
 
-    private void back_cb ()
+    private void show_game_view ()
     {
         main_stack.set_visible_child_name ("frame");
         back_button.visible = false;
@@ -420,6 +420,11 @@ public class Sudoku : Gtk.Application
         }
     }
 
+    private void back_cb ()
+    {
+        show_game_view ();
+    }
+
     private void undo_cb ()
     {
         if (main_stack.get_visible_child_name () != "frame")