[glom] Remove unnecessary virtual keywords

[Murray Cumming <murrayc src gnome org>]

commit 15c011df00c81a08b5e35ae65a4ac5236ad4db7c
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Oct 28 14:07:22 2015 +0100

    Remove unnecessary virtual keywords

 glom/libglom/test_avahi_publisher.cc               |    4 ++--
 .../utility_widgets/canvas/test_canvas_editable.cc |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/glom/libglom/test_avahi_publisher.cc b/glom/libglom/test_avahi_publisher.cc
index bcee7df..6c0edb3 100644
--- a/glom/libglom/test_avahi_publisher.cc
+++ b/glom/libglom/test_avahi_publisher.cc
@@ -14,8 +14,8 @@ public:
 
 private:
   //Signal handlers:
-  virtual void on_button_start();
-  virtual void on_button_stop();
+  void on_button_start();
+  void on_button_stop();
 
   //Member widgets:
   Gtk::Box m_box;
diff --git a/glom/utility_widgets/canvas/test_canvas_editable.cc 
b/glom/utility_widgets/canvas/test_canvas_editable.cc
index fdbf513..3cfe057 100644
--- a/glom/utility_widgets/canvas/test_canvas_editable.cc
+++ b/glom/utility_widgets/canvas/test_canvas_editable.cc
@@ -150,7 +150,7 @@ public:
 private:
   //This is an override:
   /*
-  virtual void on_show_context_menu(guint button, guint32 activate_time)
+  void on_show_context_menu(guint button, guint32 activate_time)
   {
     if(m_context_menu)
       m_context_menu->popup(button, activate_time);