[gtk/default-handling: 1/4] window: Fix up the buildable implementation

[Matthias Clasen <matthiasc src gnome org>]

commit 9def2179d68c838e44b73f0a34e221531a3a533a
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Apr 28 19:37:41 2019 +0000

    window: Fix up the buildable implementation
    
    We were assuming that the parent class has a custom
    set_property, which may not be the case. Be more
    careful.

 gtk/gtkwindow.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index 98d551460d..d47321a678 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -2176,8 +2176,10 @@ gtk_window_buildable_set_buildable_property (GtkBuildable *buildable,
 
   if (strcmp (name, "visible") == 0 && g_value_get_boolean (value))
     priv->builder_visible = TRUE;
-  else
+  else if (parent_buildable_iface->set_buildable_property)
     parent_buildable_iface->set_buildable_property (buildable, builder, name, value);
+  else
+    g_object_set_property (G_OBJECT (buildable), name, value);
 }
 
 typedef struct {