[gdm] Generate autocleanup definitions in libgdm

[Robert Ancell <rancell src gnome org>]

commit 9568eccdaa3c9cfcd129c4e7a53584ea5866772b
Author: Robert Ancell <robert ancell canonical com>
Date:   Tue Dec 5 14:20:41 2017 +1300

    Generate autocleanup definitions in libgdm

 libgdm/Makefile.am  |    2 ++
 libgdm/gdm-client.h |    4 ++++
 2 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/libgdm/Makefile.am b/libgdm/Makefile.am
index 99ada9a..2f7d7b6 100644
--- a/libgdm/Makefile.am
+++ b/libgdm/Makefile.am
@@ -12,6 +12,7 @@ gdm-manager-glue.c gdm-manager-glue.h : $(top_srcdir)/daemon/gdm-manager.xml Mak
                --c-namespace Gdm                               \
                --interface-prefix=org.gnome.DisplayManager             \
                --generate-c-code=gdm-manager-glue                      \
+               --c-generate-autocleanup=all                            \
                --annotate "org.gnome.DisplayManager.Manager"           \
                           "org.gtk.GDBus.C.Name" Manager               \
                $(top_srcdir)/daemon/gdm-manager.xml
@@ -21,6 +22,7 @@ gdm-client-glue.c gdm-client-glue.h : $(top_srcdir)/daemon/gdm-session.xml Makef
                --c-namespace Gdm                               \
                --interface-prefix=org.gnome.DisplayManager             \
                --generate-c-code=gdm-client-glue                       \
+               --c-generate-autocleanup=all                            \
                --annotate "org.gnome.DisplayManager.UserVerifier"      \
                           "org.gtk.GDBus.C.Name" UserVerifier  \
                --annotate "org.gnome.DisplayManager.Greeter"           \
diff --git a/libgdm/gdm-client.h b/libgdm/gdm-client.h
index 1ae3d39..8718a2e 100644
--- a/libgdm/gdm-client.h
+++ b/libgdm/gdm-client.h
@@ -122,6 +122,10 @@ GdmChooser        *gdm_client_get_chooser_sync          (GdmClient *client,
                                                          GCancellable     *cancellable,
                                                          GError          **error);
 
+#if GLIB_CHECK_VERSION(2, 44, 0)
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (GdmClient, g_object_unref)
+#endif
+
 G_END_DECLS
 
 #endif /* __GDM_CLIENT_H */