Summary: D1354 added a query for a possibly-empty list -- only show the table if
there are transformations.
Test Plan: Reloaded a previously-fataling page, no fatals. Viewed a file with
transformations, got a list.
Reviewers: davidreuss, btrahan, jungejason
Reviewed By: davidreuss
CC: aran, davidreuss
Differential Revision: https://secure.phabricator.com/D1414
025cc1376e