SSZ encodes a Hash32 with a length prefix

[paulhauner]

lighthouse/ssz/src/impl_encode.rs

Line 50 in cc2e210

s.append_encoded_val(&self.to_vec());

Presently, SSZ prefixes a Hash32 with a length prefix. It should not do this, as a Hash32 is fixed-length and does not need a length prefix.

When this is implemented, it will break the SszBlock struct. I am more than happy to fix that struct personally when the time comes.

[paulhauner]

@NatoliChris this is probably something you'll want to consider in your SSZ works :)

[paulhauner]

We should be able to close this when #16 is merged.