stream: writable/readable state initialised or not?

[ronag]

I've noticed a bit of an inconsistency in regards to the writable/readable state.

Sometimes we check whether it is trurthy and sometimes we don't. What is the thought here? I'm not even sure how/when the state object is not initialised since it is done in the constructor and it is never re-assigned.

Property accesses seem to usually (not always) check for unitialized value while methods in general don't perform any check.

[ronag]

ping @mcollina

[mcollina]

IMHO we should remove all those checks. I think those part of the code can be refactored a bit as well.