[gtkmm] CellArea: Add attribute_get_column().

[Murray Cumming <murrayc src gnome org>]

commit 6183a5f7a3e7766b4c8dac6678d262436a4c293c
Author: Murray Cumming <murrayc murrayc com>
Date:   Mon Sep 15 20:46:38 2014 +0200

    CellArea: Add attribute_get_column().

 gtk/src/cellarea.hg |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/src/cellarea.hg b/gtk/src/cellarea.hg
index 9daab16..f12f7ff 100644
--- a/gtk/src/cellarea.hg
+++ b/gtk/src/cellarea.hg
@@ -180,6 +180,8 @@ public:
   _WRAP_METHOD(void attribute_connect(CellRenderer& renderer, const Glib::ustring& attribute, int column), 
gtk_cell_area_attribute_connect)
   _WRAP_METHOD(void attribute_disconnect(CellRenderer& renderer, const Glib::ustring& attribute), 
gtk_cell_area_attribute_disconnect)
 
+  _WRAP_METHOD(int attribute_get_column(CellRenderer& renderer,const Glib::ustring& attribute) const, 
gtk_cell_area_attribute_get_column)
+
   //Ignore the C convenience functions.
   _IGNORE(gtk_cell_area_cell_set, gtk_cell_area_cell_get, gtk_cell_area_cell_set_valist, 
gtk_cell_area_cell_get_valist)