[gtk+] a11y: Fix gcc warning

[Benjamin Otte <otte src gnome org>]

commit 2d3c36a0211fb33d9c6de0297dbaa7e62879daf0
Author: Benjamin Otte <otte redhat com>
Date:   Thu Nov 10 16:52:44 2011 +0100

    a11y: Fix gcc warning

 gtk/a11y/gtktreeviewaccessible.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/a11y/gtktreeviewaccessible.c b/gtk/a11y/gtktreeviewaccessible.c
index 2793f9b..7041789 100644
--- a/gtk/a11y/gtktreeviewaccessible.c
+++ b/gtk/a11y/gtktreeviewaccessible.c
@@ -238,7 +238,7 @@ gtk_tree_view_accessible_initialize (AtkObject *obj,
   accessible->n_children_deleted = 0;
 
   accessible->cell_info_by_index = g_hash_table_new_full (g_int_hash,
-      g_int_equal, NULL, cell_info_free);
+      g_int_equal, NULL, (GDestroyNotify) cell_info_free);
 
   widget = GTK_WIDGET (data);
   tree_view = GTK_TREE_VIEW (widget);