[gtkmm] Device: Add get_vendor_id() and get_product_id().

[Murray Cumming <murrayc src gnome org>]

commit 026cfba29a595d1c6ce141a2639cb5affdfc5398
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Feb 5 13:28:14 2015 +0100

    Device: Add get_vendor_id() and get_product_id().
    
    I used ustring for the return values, instead of std::string,
    because the documentation says that these can be used to build
    GSettings paths, and Gio::Setting uses ustring.

 gdk/src/device.hg |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gdk/src/device.hg b/gdk/src/device.hg
index 997ce76..b4d974c 100644
--- a/gdk/src/device.hg
+++ b/gdk/src/device.hg
@@ -198,6 +198,10 @@ public:
 
   _WRAP_METHOD(Glib::RefPtr<Window> get_last_event_window(), gdk_device_get_last_event_window, refreturn)
   _WRAP_METHOD(Glib::RefPtr<const Window> get_last_event_window() const, gdk_device_get_last_event_window, 
refreturn, constversion)
+
+  _WRAP_METHOD(Glib::ustring get_vendor_id() const, gdk_device_get_vendor_id)
+  _WRAP_METHOD(Glib::ustring get_product_id(), gdk_device_get_product_id)
+
 };
 
 } // namespace Gdk