[libchamplainmm] MapSource: Add conversion to make vfuncs work

[Juan R. Garcia Blanco <juanrgar src gnome org>]

commit bfbf2f4fee37e7e0a5b22d297ae236bebd4c5adb
Author: Juan R. García Blanco <juanrgar gmail com>
Date:   Tue Jun 10 20:49:38 2014 +0200

    MapSource: Add conversion to make vfuncs work
    
    The conversion has been taken from gtkmm/actionable.hg.

 champlain/src/map-source.hg |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/champlain/src/map-source.hg b/champlain/src/map-source.hg
index 39a4da3..b3f8ff7 100644
--- a/champlain/src/map-source.hg
+++ b/champlain/src/map-source.hg
@@ -72,9 +72,10 @@ class MapSource : public Glib::Object
 
 protected:
   _WRAP_VFUNC(std::string get_id() const, get_id)
-//  _WRAP_VFUNC(Glib::ustring get_name() const, get_name)
-//  _WRAP_VFUNC(Glib::ustring get_license() const, get_license)
-//  _WRAP_VFUNC(Glib::ustring get_license_uri() const, get_license_uri)
+#m4 _CONVERSION(`Glib::ustring',`const gchar*',`g_strdup($3.c_str())')
+  _WRAP_VFUNC(Glib::ustring get_name() const, get_name)
+  _WRAP_VFUNC(Glib::ustring get_license() const, get_license)
+  _WRAP_VFUNC(Glib::ustring get_license_uri() const, get_license_uri)
 
   _WRAP_VFUNC(guint get_min_zoom_level() const, get_min_zoom_level)
   _WRAP_VFUNC(guint get_max_zoom_level() const, get_max_zoom_level)