affile: Call log_proto_file_writer_new() properly

The order of log_proto_file_writer_new() parameters are different
between 3.3 and 3.4+, which causes confusion, and the last patch changed
the order to match 3.3. This one updates affile to pass the parameters
in the correct order.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>