[glom] test_canvas_editable: Use unique_ptr<> instead of naked new.

[Murray Cumming <murrayc src gnome org>]

commit 28bf17468cf539e4dfce9a0a1378c5b3465348c0
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Feb 5 11:12:22 2016 +0100

    test_canvas_editable: Use unique_ptr<> instead of naked new.

 .../utility_widgets/canvas/test_canvas_editable.cc |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/glom/utility_widgets/canvas/test_canvas_editable.cc 
b/glom/utility_widgets/canvas/test_canvas_editable.cc
index 97343d6..e7b040c 100644
--- a/glom/utility_widgets/canvas/test_canvas_editable.cc
+++ b/glom/utility_widgets/canvas/test_canvas_editable.cc
@@ -184,11 +184,11 @@ private:
     menu->append(_("_Delete"), "context.delete");
     
     //Get the menu:
-    m_context_menu = new Gtk::Menu(menu); 
+    m_context_menu = std::make_unique<Gtk::Menu>(menu);
     m_context_menu->attach_to_widget(*this);
   }
  
-  Gtk::Menu* m_context_menu;
+  std::unique_ptr<Gtk::Menu> m_context_menu;
   Glib::RefPtr<Gtk::ActionGroup> m_context_menu_action_group;
   Glib::RefPtr<Gtk::Builder> m_context_menu_builder;
 };