Message Listener with Attachment

[zachariahtimothy]

Thank you for such a great package, until this bug it has worked great. When listening for new email using onNewEmail, I receive the following error:
TypeError: First argument needs to be a number, array or string.
The message I am listening for has an attachment and that seems to be what is causing the error. Any help would be great, as it seems like a simple fix. Full stack trace is as follows:
Exception in setTimeout callback: TypeError: First argument needs to be a number, array or string. at decodeBase64 (decoders.js:34:10) at message.js:49:16 at Array.forEach (native) at Function._.each._.forEach (packages/underscore/packages/underscore.js:134:1) at messageFromPayload (message.js:46:7) at parseDoc (message.js:34:12) at new GMail.Message (message.js:5:18) at [object Object].GMail.Listener.handleNewMessage (listener.js:28:17) at listener.js:16:10
While debugging I found in the messageFromPayload function is trying to decode the attachment part which has no body and therefore part.body.data is undefined.

Thanks again!