Audit - fix a bug with unloaded repositories

Summary:
...because its always at least the string <ATTACHABLE>... Not sure when we'd hit this / see the TODO about making it better, but its definitely a logic bug right now.

(an update to D12347 helped me notice that this conditional is always hit and may fatal later)

Test Plan: NA

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D12348