[gtkmm] ComboBox: Ignore a private function.

[Murray Cumming <murrayc src gnome org>]

commit acca00a7809d0a3aa7bdd5fcd8ad6d41bc53d300
Author: Murray Cumming <murrayc murrayc com>
Date:   Mon Sep 15 20:49:03 2014 +0200

    ComboBox: Ignore a private function.

 gtk/src/combobox.hg |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/src/combobox.hg b/gtk/src/combobox.hg
index 5de7125..15387e4 100644
--- a/gtk/src/combobox.hg
+++ b/gtk/src/combobox.hg
@@ -220,6 +220,9 @@ public:
    */
   const Entry* get_entry() const;
 
+  //Ignore private functions.
+  _IGNORE(gtk_combo_box_get_popup)
+
 
   _WRAP_PROPERTY("model", Glib::RefPtr<TreeModel>)
   _WRAP_PROPERTY("wrap_width", int)