Shopify/active_merchant — pull request #487 by BlakeMesdag (2012-10-26 17:16:25+00:00)
Title: Add override for PostCodes for Ireland if not included in requests

## Issue

Ireland doesn't have Postal Codes but Sage Pay Form requires a post code for all orders being passed.

## Changes

This adds default values to the sage pay form helpers fields method to pass a default post code of 0000 if one hasn't been provided.

## Reviewers

@jduff @Soleone