acl: Crashfix.

--HG--
branch : HEAD

diff --git a/src/plugins/acl/acl-lookup-dict.c b/src/plugins/acl/acl-lookup-dict.c
index 71c239468703b17b504867fb69c9db5838bd6550..54c7846714115bd3f104205f4486a18e2fdbe95b 100644 (file)
--- a/src/plugins/acl/acl-lookup-dict.c
+++ b/src/plugins/acl/acl-lookup-dict.c
@@ -112,6 +112,9 @@ static int acl_lookup_dict_rebuild_add_backend(struct mail_namespace *ns,
        string_t *id;
        int ret, ret2 = 0;
 
+       if ((ns->flags & NAMESPACE_FLAG_INTERNAL) != 0)
+               return 0;
+
        id = t_str_new(128);
        backend = acl_storage_get_backend(ns->storage);
        ctx = acl_backend_nonowner_lookups_iter_init(backend);