stream: fix destroy(err, cb) regression

Fixed a regression that caused the callback passed to destroy()
to not be called if the stream was already destroyed.
This caused a regression on the ws module in CITGM introduced by
https://github.com/nodejs/node/pull/12925.

PR-URL: https://github.com/nodejs/node/pull/13156
Fixes: https://github.com/websockets/ws/issues/1118


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Calvin Metcalf <calvin.metcalf@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>