PrestaShop/PrestaShop — pull request #1577 by adastier (2014-03-19 11:29:07+00:00)
Title: [-] WS : Fix bug #PSCFI-5696, Price empty when = 0

It looks like the suggested fix (from http://forge.prestashop.com/browse/PSCFI-5696 ) never made it. I experienced the same bug when working with the Webservice. Here is the fix and a little extra tidy up.