Everything depends on what type of legal entity your business is. I believe you did an LLC, which for practical purposes, is a partnership, in which income passes through to you on a K1 and is taxed as regular income on your 1040 regardless of whether you or your partner take any distributions out of the business. Actually, under current law, you and your partner can simply do schedule Cs, which makes things much easier.
So in general, no, you don't "need" to take a salary, as income passes through to you and is taxed.
I don't see how the income passed through to you and taxed as ordinary income could have yielded no net income on your part - that could only happen if the income was taxed at 100%!
Paying yourself a salary becomes important when you operate as a C-Corporation, as the IRS doesn't like when income is passed through to operating owners of a C-Corp as preferred dividends, which, if you structure things correctly, will only be taxed at 5%, vs. the regular income tax rate for an individual.
So if you are an LLC, just think of your portion of the partnership as a sole proprietor for tax purposes, filing a schedule C. You wouldn't take a salary for that, since all your income will be taxed as regular income!
In addition, you must pay self employment tax on your income from the partnership (SS/Medicare). You REALLY don't want to hose yourself on that one.
Seriously, if you haven't got all this stuff up to snuff, hire an accountant (Lord Tempest may rant about that, but I think you now see the need for it). If you don't fill out the self employment tax form for your 1040 and you have an LLC partnership, the IRS will see it, you'll get audited through the roof, and end up with penalties and interest that will be staggering.