[gtksourceviewmm] StyleSchemeChooser: const correction and refcount correction.

[Murray Cumming <murrayc src gnome org>]

commit fef348863f3df2434ba4a7eb5700a02923943aca
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Aug 3 12:08:24 2016 +0200

    StyleSchemeChooser: const correction and refcount correction.

 codegen/m4/convert_gtksourceview.m4     |    1 +
 gtksourceview/src/styleschemechooser.hg |    3 ++-
 2 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/codegen/m4/convert_gtksourceview.m4 b/codegen/m4/convert_gtksourceview.m4
index 4b7c4f8..84f2683 100644
--- a/codegen/m4/convert_gtksourceview.m4
+++ b/codegen/m4/convert_gtksourceview.m4
@@ -109,6 +109,7 @@ _CONVERSION(`const Glib::RefPtr<Style>&',`GtkSourceStyle*',`Glib::unwrap($3)')
 
 # GtkSourceStyleScheme -> Gsv::StyleScheme
 _CONVERSION(`GtkSourceStyleScheme*',`Glib::RefPtr<StyleScheme>',`Glib::wrap($3)')
+_CONVERSION(`GtkSourceStyleScheme*',`Glib::RefPtr<const StyleScheme>',`Glib::wrap($3)')
 
 
 # Gsv::StyleScheme -> GtkSourceStyleScheme
diff --git a/gtksourceview/src/styleschemechooser.hg b/gtksourceview/src/styleschemechooser.hg
index 10e203d..a3aa75f 100644
--- a/gtksourceview/src/styleschemechooser.hg
+++ b/gtksourceview/src/styleschemechooser.hg
@@ -44,7 +44,8 @@ public:
    *
    * @newin{3,16}
    */
-  _WRAP_METHOD(Glib::RefPtr<StyleScheme> get_style_scheme(), 
gtk_source_style_scheme_chooser_get_style_scheme)
+  _WRAP_METHOD(Glib::RefPtr<StyleScheme> get_style_scheme(), 
gtk_source_style_scheme_chooser_get_style_scheme, refreturn)
+  _WRAP_METHOD(Glib::RefPtr<const StyleScheme> get_style_scheme() const, 
gtk_source_style_scheme_chooser_get_style_scheme, refreturn, constversion)
 
   /** Sets the scheme.
    *