mozilla/zamboni — pull request #1911 by ngokevin (2014-04-03 00:16:11+00:00)
Title: use int 0 rather than 'never' when getting icon hash

Is this acceptable? Doing this on a whim. @diox

To fix traceback: https://gist.github.com/ngokevin/034787f4644fd05d2494

settings.ADDON_ICON_URL ends with a ```%d``` format placeholder so an integer is required.