[vala] glib-2.0: Fix DuplicateFunc

[Rico Tzschichholz <ricotz src gnome org>]

commit 642110c97e1c5c54381f341642926f783947b36c
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sat Feb 6 14:10:16 2016 +0100

    glib-2.0: Fix DuplicateFunc

 vapi/glib-2.0.vapi |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/vapi/glib-2.0.vapi b/vapi/glib-2.0.vapi
index 4d664eb..500886a 100644
--- a/vapi/glib-2.0.vapi
+++ b/vapi/glib-2.0.vapi
@@ -4963,7 +4963,7 @@ namespace GLib {
        }
 
        public delegate void DataForeachFunc<G> (Quark key_id, G data);
-       public delegate void DuplicateFunc<G> (G data);
+       public delegate G DuplicateFunc<G> (G data);
 
        /* GArray */