Initialize a class property
Initialize a class property

Summary: This was identified using D13493.

Test Plan: `arc unit`

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D13511

julkiewicz/libphutil,julkiewicz/libphutil,julkiewicz/libphutil