[vte] pty: Use G_ADD_PRIVATE instead of g_type_class_add_private

[Debarshi Ray <debarshir src gnome org>]

commit 6edda4d403067c2a8d2d8b5d59879e11fbbe92fd
Author: Debarshi Ray <debarshir gnome org>
Date:   Mon Apr 18 13:14:11 2016 +0200

    pty: Use G_ADD_PRIVATE instead of g_type_class_add_private
    
    https://bugzilla.gnome.org/show_bug.cgi?id=765210

 src/pty.cc |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/src/pty.cc b/src/pty.cc
index ea88c77..a615e41 100644
--- a/src/pty.cc
+++ b/src/pty.cc
@@ -781,6 +781,7 @@ vte_pty_initable_iface_init (GInitableIface  *iface)
 /* GObjectClass impl */
 
 G_DEFINE_TYPE_WITH_CODE (VtePty, vte_pty, G_TYPE_OBJECT,
+                         G_ADD_PRIVATE (VtePty)
                          G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, vte_pty_initable_iface_init))
 
 static void
@@ -788,7 +789,7 @@ vte_pty_init (VtePty *pty)
 {
         VtePtyPrivate *priv;
 
-        priv = pty->priv = G_TYPE_INSTANCE_GET_PRIVATE (pty, VTE_TYPE_PTY, VtePtyPrivate);
+        priv = pty->priv = (VtePtyPrivate *)vte_pty_get_instance_private (pty);
 
         priv->flags = VTE_PTY_DEFAULT;
         priv->pty_fd = -1;
@@ -861,8 +862,6 @@ vte_pty_class_init (VtePtyClass *klass)
 {
         GObjectClass *object_class = G_OBJECT_CLASS (klass);
 
-        g_type_class_add_private(object_class, sizeof(VtePtyPrivate));
-
         object_class->set_property = vte_pty_set_property;
         object_class->get_property = vte_pty_get_property;
         object_class->finalize     = vte_pty_finalize;