stream: cleanup pipeline destroyer
Slightly cleans up the destroyer logic. Make readable and writable use similar logic.
i.e.
if (!err && reading && !writing && stream.writable) {
return callback();
}
if (!err && !reading && writing && stream.readable) {
return callback();
}
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines