Fix issue with loadRelativeEdges()

Summary: I'm going to just delete all this code at some point, but fixing it now means piles of single gets, so unbreak it first. I'll file something.

Test Plan: Releeph is less fataley.

Reviewers: andrewjcg, btrahan

Reviewed By: andrewjcg

CC: aran

Differential Revision: https://secure.phabricator.com/D6945

src/infrastructure/storage/lisk/PhabricatorLiskDAO.php

@@ -6,7 +6,7 @@
  */
 abstract class PhabricatorLiskDAO extends LiskDAO {
 
-  private $edges = self::ATTACHABLE;
+  private $edges = array();
   private static $namespaceStack = array();
 
   const ATTACHABLE = "<attachable>";