[gtkmm: 2/5] Gtk: make FileFilter inherit Filter

[Kjell Ahlstedt <kjellahl src gnome org>]

commit f5e2eba38034018f37e46513ecb07642e5afdaa7
Author: Andreas Persson <andreasp56 outlook com>
Date:   Sun Aug 9 20:20:22 2020 +0200

    Gtk: make FileFilter inherit Filter
    
    GtkFileFilter has been changed to be a GtkFilter. Adopt to the change.

 gtk/src/filefilter.hg | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)
---
diff --git a/gtk/src/filefilter.hg b/gtk/src/filefilter.hg
index b9223c29..50e4437c 100644
--- a/gtk/src/filefilter.hg
+++ b/gtk/src/filefilter.hg
@@ -15,11 +15,11 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#include <glibmm/object.h>
+#include <gtkmm/filter.h>
 #include <gtkmm/buildable.h>
 
 _DEFS(gtkmm,gtk)
-_PINCLUDE(glibmm/private/object_p.h)
+_PINCLUDE(gtkmm/private/filter_p.h)
 
 namespace Gtk
 {
@@ -39,10 +39,9 @@ namespace Gtk
  *
  * Filters are used by adding them to a Gtk::FileChooser. See Gtk::FileChooser::add_filter().
  */
-class GTKMM_API FileFilter : public Glib::Object, public Buildable
+class GTKMM_API FileFilter : public Gtk::Filter, public Buildable
 {
-  _CLASS_GOBJECT(FileFilter, GtkFileFilter, GTK_FILE_FILTER, Glib::Object, GObject, , , GTKMM_API)
-  _DERIVES_INITIALLY_UNOWNED()
+  _CLASS_GOBJECT(FileFilter, GtkFileFilter, GTK_FILE_FILTER, Gtk::Filter, GtkFilter, , , GTKMM_API)
   _IMPLEMENTS_INTERFACE(Buildable)
 protected:
   _CTOR_DEFAULT