[gtk+] introspection: mark data in GtkCallback as closure

[Carlos Garnacho <carlosg src gnome org>]

commit db569cbee7e3842d802c5f1d53e28d0dde98ffeb
Author: Carlos Garnacho <carlos lanedo com>
Date:   Wed Jun 27 14:51:57 2012 +0200

    introspection: mark data in GtkCallback as closure
    
    This is needed for so GtkContainer::forall() can be implemented
    in non-native code, and the callback gets the passed data if
    called.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=644926#c28

 gtk/gtkwidget.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkwidget.h b/gtk/gtkwidget.h
index 94189dd..576d7e9 100644
--- a/gtk/gtkwidget.h
+++ b/gtk/gtkwidget.h
@@ -78,7 +78,7 @@ typedef 	GdkRectangle	   GtkAllocation;
 /**
  * GtkCallback:
  * @widget: the widget to operate on
- * @data: user-supplied data
+ * @data: (closure): user-supplied data
  *
  * The type of the callback functions used for e.g. iterating over
  * the children of a container, see gtk_container_foreach().