[gtk+] Document that the GTK_STOCK_FILE label is new

[Matthias Clasen <matthiasc src gnome org>]

commit 1f1b40419418680c390503a69bfa04085d416046
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Aug 25 00:46:47 2010 -0400

    Document that the GTK_STOCK_FILE label is new

 gtk/gtkstock.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkstock.h b/gtk/gtkstock.h
index a8a7701..5307966 100644
--- a/gtk/gtkstock.h
+++ b/gtk/gtkstock.h
@@ -308,6 +308,8 @@ void          gtk_stock_set_translate_func (const gchar      *domain,
  * The "File" item.
  * <inlinegraphic fileref="gtk-file.png" format="PNG"></inlinegraphic>
  *
+ * Since 3.0, this item has a label, before it only had an icon.
+ *
  * Since: 2.6
  */
 #define GTK_STOCK_FILE             "gtk-file"