[empathy] use tp_value_array_unpack

[Guillaume Desmottes <gdesmott src gnome org>]

commit 749997ed48b485fa703d4c417a4ee3224955fe6e
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Wed Apr 21 10:33:25 2010 +0200

    use tp_value_array_unpack

 libempathy/empathy-contact.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/libempathy/empathy-contact.c b/libempathy/empathy-contact.c
index 4c1b34c..e8b3884 100644
--- a/libempathy/empathy-contact.c
+++ b/libempathy/empathy-contact.c
@@ -1413,9 +1413,9 @@ tp_caps_to_capabilities (TpCapabilities *caps)
       const gchar *chan_type;
 
       class_struct = g_ptr_array_index (classes, i);
-      fixed_prop = g_value_get_boxed (g_value_array_get_nth (class_struct, 0));
-      allowed_prop = g_value_get_boxed (g_value_array_get_nth (
-            class_struct, 1));
+      tp_value_array_unpack (class_struct, 2,
+          &fixed_prop,
+          &allowed_prop);
 
       handle_type = tp_asv_get_uint32 (fixed_prop,
         TP_IFACE_CHANNEL ".TargetHandleType", NULL);