ginatrapani/ThinkUp — pull request #2095 by dgw (2014-09-12 11:07:30+00:00)
Title: [foursquare] update for new photo data structure

Foursquare changed the photo object structure at some point. Checkins
with photos attached were causing database integrity errors due to the
`$photo->url` field not existing, causing the crawler to try to insert
`NULL` into a `NOT NULL` field.

Not sure if this is changed for all checkins or just checkins since a
certain date, so preserved use of the old field in an `elseif`.