[libpeas] Fix extension subclass initialization

[Steve Frécinaux <sfre src gnome org>]

commit 971e7e6d071e19e20f184afd9fe10a953543719a
Author: Garrett Regier <alias301 gmail com>
Date:   Fri Mar 18 07:29:43 2011 -0700

    Fix extension subclass initialization

 libpeas/peas-extension-subclasses.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/libpeas/peas-extension-subclasses.c b/libpeas/peas-extension-subclasses.c
index a97085d..0a4601a 100644
--- a/libpeas/peas-extension-subclasses.c
+++ b/libpeas/peas-extension-subclasses.c
@@ -334,7 +334,8 @@ peas_extension_register_subclass (GType parent_type,
         GSIZE_TO_POINTER (extension_type),
         0,
         0,
-        (GInstanceInitFunc) extension_subclass_instance_init
+        (GInstanceInitFunc) extension_subclass_instance_init,
+        NULL
       };
       GInterfaceInfo iface_info = {
         (GInterfaceInitFunc) implement_interface_methods,