[gtk+] flow box: Fix up docs

[Matthias Clasen <matthiasc src gnome org>]

commit 47167f59be2f61bd4d7ca3cbbd42df7e3ef5b7e8
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Sep 21 18:50:31 2015 -0400

    flow box: Fix up docs

 gtk/gtkflowbox.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkflowbox.h b/gtk/gtkflowbox.h
index 2384ff5..f15a86a 100644
--- a/gtk/gtkflowbox.h
+++ b/gtk/gtkflowbox.h
@@ -102,6 +102,7 @@ struct _GtkFlowBoxChildClass
 /**
  * GtkFlowBoxCreateWidgetFunc:
  * @item: the item from the model for which to create a widget for
+ * @user_data: user data from gtk_flow_box_bind_model()
  *
  * Called for flow boxes that are bound to a #GListModel with
  * gtk_flow_box_bind_model() for each item that gets added to the model.