Add missing '00 00' to the hex dump of the outro of indefinite length empty parts.

If the decoded ASN1 was '30 80 00 00' then the hex dump showed only '30 80'
Style.
propagate from branch 'it.lapo.asn1js.github-5' (head b931f4d339abc9f989ad38e3d36aec68256cbf53)
            to branch 'it.lapo.asn1js' (head 57c65b5f8aea66acf97fb46ffa573df8813a7bf5)