[gtk+] actions: Fix compile warning

[Jasper St. Pierre <jstpierre src gnome org>]

commit b6acc8f2c572f72d5c24217e604b7295ff5d9ddf
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Fri Dec 12 17:39:46 2014 -0800

    actions: Fix compile warning

 gtk/inspector/actions.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/inspector/actions.c b/gtk/inspector/actions.c
index ff8e2e1..4d7523a 100644
--- a/gtk/inspector/actions.c
+++ b/gtk/inspector/actions.c
@@ -216,7 +216,7 @@ gtk_inspector_actions_set_object (GtkInspectorActions *sl,
     add_group (sl, G_ACTION_GROUP (object), "win");
   else if (GTK_IS_WIDGET (object))
     {
-      gchar **prefixes;
+      const gchar **prefixes;
       GActionGroup *group;
       gint i;