Sitata/titanium-google-analytics — pull request #1 by ndizazzo (2014-11-20 19:24:36+00:00)
Title: Modifies field validation macro to allow nil currency parameter

I noticed while looking at the source for `tracker.trackTransactionItem`, that the "currency" parameter is not using the same macro as in `tracker.trackTransaction` to ensure the field's value. I changed the macro it was using to make it consistent with the documentation in the readme file and the `tracker.trackTransaction` call.