minor bug in .waterfall()

[debonet]

Function reads:

async.waterfall = function (tasks, callback) {
    if (!tasks.length) {
        return callback();
    }
    callback = callback || function () {};
    ....

should be:

async.waterfall = function (tasks, callback) {
    callback = callback || function () {};
    if (!tasks.length) {
        return callback();
    }
    ....

Just in case the tasks are empty and the callback is null

Better yet, you could check to make sure tasks is defined as well:

async.waterfall = function (tasks, callback) {
    callback = callback || function () {};
    if (!tasks || !tasks.length) {
        return callback();
    }
    ....

[Sheile]

Part of this ticket is duplicate #48 / 949e9e1

[alizbazar]

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Date: Fri, 28 Mar 2014 10:15:10 -0700
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Closed #71.

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Closed #71.

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