caolan/async — Issue #98: "err" should be null not undefined
Author: johnnywengluu
Created: 2012-02-20 06:09:56+00:00
State: open

When there is no error the error passed to a callback should be null instead of undefined.

This makes it mimic node.js default behavior so we don't have to change our code.

A concrete example is that parallel() is passing undefined as error to the callback.