This changes the disparity of bufferedRequestCount and the actual buffer
on file _stream_writable.js
PR-URL: https://github.com/nodejs/node/pull/15661
Fixes: https://github.com/nodejs/node/issues/6758
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
