[glibmm] Gio::Application::get_default(): Add refreturn

[Kjell Ahlstedt <kjellahl src gnome org>]

commit bd988a80db4b05b0b1bbee4f68666d815d7641f8
Author: Kjell Ahlstedt <kjell ahlstedt bredband net>
Date:   Mon Mar 13 15:19:13 2017 +0100

    Gio::Application::get_default(): Add refreturn
    
    Bug 779936

 gio/src/application.hg |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gio/src/application.hg b/gio/src/application.hg
index e4d3a63..6b36ad3 100644
--- a/gio/src/application.hg
+++ b/gio/src/application.hg
@@ -344,7 +344,7 @@ public:
   /// Unsets any existing default application.
   static void unset_default();
 
-  _WRAP_METHOD(static Glib::RefPtr<Application> get_default(), g_application_get_default)
+  _WRAP_METHOD(static Glib::RefPtr<Application> get_default(), g_application_get_default, refreturn)
 
   _WRAP_METHOD(void mark_busy(), g_application_mark_busy)
   _WRAP_METHOD(void unmark_busy(), g_application_unmark_busy)