Pagination.current is sometimes nil

[CloCkWeRX]

https://da.kiama.nsw.gov.au/atdis/1.0/applications.json?lodgement_date_end=2016-03-22&lodgement_date_start=2016-02-21&page=6

produces

{"response":[],"count":0,"pagination":null}

While I'm not sure if thats conforming or not to the spec; it means that consuming code fails with:

/app/vendor/bundle/ruby/2.0.0/bundler/gems/atdisplanningalertsfeed-ce20de6801cf/lib/atdisplanningalertsfeed.rb:22:in `save_page' : undefined method `current' for nil:NilClass (NoMethodError)
    from /app/vendor/bundle/ruby/2.0.0/bundler/gems/atdisplanningalertsfeed-ce20de6801cf/lib/atdisplanningalertsfeed.rb:17:in `save'
    from scraper.rb:6:in `<main>'

and you have to wrap all of your calls to

page.pagination.current

in

page.pagination.current if page.pagination

It would be better for this to never be nil, but a valid pagination object with defaults.