Initialize is_feed function for backends to NULL

diff --git a/atom/backend.c b/atom/backend.c
index 7fe3beb..4e44c3c 100644 (file)
--- a/atom/backend.c
+++ b/atom/backend.c
@@ -37,6 +37,7 @@ atom_backend_new ()
   backend = g_slice_new (AtomBackend);
   backend->retrieve_entry = NULL;
   backend->enumerate_entries = NULL;
+  backend->is_feed = NULL;
   return backend;
 }