[nautilus] directory: define autoptr cleanup func

[Ernestas Kulik <ernestask src gnome org>]

commit 2f762278b2d4ceac38c780feb3715d8e76f25947
Author: Ernestas Kulik <ernestask gnome org>
Date:   Thu Aug 24 16:22:39 2017 +0300

    directory: define autoptr cleanup func
    
    If any derived classes have one of their own defined, the compiler will
    start spewing warnings.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=786760

 src/nautilus-directory.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/nautilus-directory.h b/src/nautilus-directory.h
index 231384f..9a63aa8 100644
--- a/src/nautilus-directory.h
+++ b/src/nautilus-directory.h
@@ -170,6 +170,8 @@ NautilusDirectory *nautilus_directory_get_for_file             (NautilusFile
 NautilusDirectory *nautilus_directory_ref                      (NautilusDirectory         *directory);
 void               nautilus_directory_unref                    (NautilusDirectory         *directory);
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (NautilusDirectory, nautilus_directory_unref)
+
 /* Access to a URI. */
 char *             nautilus_directory_get_uri                  (NautilusDirectory         *directory);
 GFile *            nautilus_directory_get_location             (NautilusDirectory         *directory);