[gtk/ebassi/for-master] docs: Hide GtkBitsetIter fields

[Emmanuele Bassi <ebassi src gnome org>]

commit 3e8d15711850816d255537643819caf1efbf28f3
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Dec 1 17:18:38 2020 +0000

    docs: Hide GtkBitsetIter fields

 gtk/gtkbitset.h | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gtk/gtkbitset.h b/gtk/gtkbitset.h
index ad865a4e05..419b4df8d1 100644
--- a/gtk/gtkbitset.h
+++ b/gtk/gtkbitset.h
@@ -143,6 +143,7 @@ typedef struct _GtkBitsetIter GtkBitsetIter;
 
 struct _GtkBitsetIter
 {
+  /*< private >*/
   gpointer private_data[10];
 };