Fix nil cannot be reference type (List, Array, Dictionary).
Fix nil cannot be reference type (List, Array, Dictionary).

undeadlabs/msgpack-cli,msgpack/msgpack-cli,msgpack/msgpack-cli,scopely/msgpack-cli,modulexcite/msgpack-cli,undeadlabs/msgpack-cli,modulexcite/msgpack-cli,scopely/msgpack-cli