More correct fix - set default value array() for getParameter call.
Summary: Ref T8577, More correct fix - set default value array() for getParameter call.
Test Plan: Make sure saved queries like Month View, Day View, and Upcoming Events, still work.
Reviewers: epriestley, Blessed Reviewers
Reviewed By: epriestley, Blessed Reviewers
Subscribers: epriestley, Korvin
Maniphest Tasks: T8577
Differential Revision: https://secure.phabricator.com/D13330