[gtk+] GtkMenuTracker: add missing documentation fragment

[Ryan Lortie <desrt src gnome org>]

commit ef2c68462b6fd83d9e86e3db552f96c910f8cc21
Author: Ryan Lortie <desrt desrt ca>
Date:   Tue Dec 16 12:22:23 2014 -0500

    GtkMenuTracker: add missing documentation fragment
    
    https://bugzilla.gnome.org/show_bug.cgi?id=741610

 gtk/gtkmenutracker.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkmenutracker.c b/gtk/gtkmenutracker.c
index 7634744..1b89fe3 100644
--- a/gtk/gtkmenutracker.c
+++ b/gtk/gtkmenutracker.c
@@ -495,6 +495,9 @@ gtk_menu_tracker_section_new (GtkMenuTracker *tracker,
  * @model: the model to flatten
  * @with_separators: if the toplevel should have separators (ie: TRUE
  *   for menus, FALSE for menubars)
+ * @merge_sections: if sections should have their items merged in the
+ *   usual way or reported only as separators (which can be queried to
+ *   manually handle the items)
  * @action_namespace: the passed-in action namespace
  * @insert_func: insert callback
  * @remove_func: remove callback