[evolution-data-server] EBookBackendFactory extends EDataBookFactory.

[Matthew Barnes <mbarnes src gnome org>]

commit 214eef9f3f0b7de2f34f3d062bb2c7773c5c1010
Author: Matthew Barnes <mbarnes redhat com>
Date:   Sun Apr 15 12:27:19 2012 -0400

    EBookBackendFactory extends EDataBookFactory.

 addressbook/libedata-book/e-book-backend-factory.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/addressbook/libedata-book/e-book-backend-factory.c b/addressbook/libedata-book/e-book-backend-factory.c
index a2e1341..155e9cf 100644
--- a/addressbook/libedata-book/e-book-backend-factory.c
+++ b/addressbook/libedata-book/e-book-backend-factory.c
@@ -11,6 +11,7 @@
 
 #include "e-book-backend.h"
 #include "e-book-backend-factory.h"
+#include "e-data-book-factory.h"
 
 G_DEFINE_ABSTRACT_TYPE (
 	EBookBackendFactory,
@@ -48,8 +49,12 @@ book_backend_factory_new_backend (EBackendFactory *factory,
 static void
 e_book_backend_factory_class_init (EBookBackendFactoryClass *class)
 {
+	EExtensionClass *extension_class;
 	EBackendFactoryClass *factory_class;
 
+	extension_class = E_EXTENSION_CLASS (class);
+	extension_class->extensible_type = E_TYPE_DATA_BOOK_FACTORY;
+
 	factory_class = E_BACKEND_FACTORY_CLASS (class);
 	factory_class->get_hash_key = book_backend_factory_get_hash_key;
 	factory_class->new_backend = book_backend_factory_new_backend;