s3/dbwrap_ctdb: set async_ctx to initialized

After initializing the async connection to ctdb we must set initialized
to true.

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>

source3/lib/dbwrap/dbwrap_ctdb.c

@@ -109,6 +109,7 @@ static int ctdb_async_ctx_init_internal(TALLOC_CTX *mem_ctx,
 		return ret;
 	}
 
+	ctdb_async_ctx.initialized = true;
 	return 0;
 }