Fix IsTypeOf for nil returns false even if specified type is reference type ( that is, collection).
Fix IsTypeOf for nil returns false even if specified type is reference type ( that is, collection).

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