[gtkmm] Application: Add missing gtk_init() call in one of the constructors.

[Murray Cumming <murrayc src gnome org>]

commit 931ca9a52b9f4477094ea19748e26dbba702063b
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Sep 20 12:39:07 2013 +0200

    Application: Add missing gtk_init() call in one of the constructors.
    
    * gtk/src/application.ccg: The constructor that took no argc/argv
      also needed gtk_init(). This is causing crashes on Fedora.
      Presumably gtk_init() was only recently able to take NULL.

 gtk/src/application.ccg |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/src/application.ccg b/gtk/src/application.ccg
index e5c82cc..4498ed8 100644
--- a/gtk/src/application.ccg
+++ b/gtk/src/application.ccg
@@ -72,6 +72,7 @@ Application::Application(const Glib::ustring& application_id, Gio::ApplicationFl
   m_argc(0),
   m_argv(0)
 {
+  gtk_init(0, 0);
 }
 
 Application::Application(int& argc, char**& argv, const Glib::ustring& application_id, Gio::ApplicationFlags 
flags)