RPC FixedList512Bytes<int> 0 on receive

[optimise]

@CMarastoni

I agree, that was a missing basic type we should support.

I think we can also try to add support for generic types like FixedList<> or in general other fixed size container of us. But it is not on the road map yet.

For double and other types you guys tend to use and you are seeing we are missing some support please continue to report.

Is that FixedList<> RPC will be supported at next 1.1 exp release?