[gtkmm] EntryCompletion: Add the no_matches signal.

[Murray Cumming <murrayc src gnome org>]

commit 20c1b17e58c237b998e74c3761344bfe600b3ed8
Author: Murray Cumming <murrayc murrayc com>
Date:   Mon Sep 15 20:51:41 2014 +0200

    EntryCompletion: Add the no_matches signal.
    
    With no default handler, to avoid breaking ABI.

 gtk/src/entrycompletion.hg |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gtk/src/entrycompletion.hg b/gtk/src/entrycompletion.hg
index 59e6299..8d8b3dc 100644
--- a/gtk/src/entrycompletion.hg
+++ b/gtk/src/entrycompletion.hg
@@ -197,6 +197,10 @@ dnl
 
   _WRAP_SIGNAL(bool insert_prefix(const Glib::ustring& prefix), insert_prefix)
 
+  //TODO: Remove no_default_handler when we can break ABI.
+  _WRAP_SIGNAL(void no_matches(), no_matches, no_default_handler)
+
+
   _WRAP_PROPERTY("model", Glib::RefPtr<Gtk::TreeModel>)
   _WRAP_PROPERTY("minimum_key_length", int)
   _WRAP_PROPERTY("text_column", int)