Fix a missed use of project icons in typehaeads

Summary: I missed this in the recent icon customziation thing.

Test Plan: Typehaead'ed some projects, saw icons properly.

Reviewers: chad

Reviewed By: chad

Differential Revision: https://secure.phabricator.com/D14975

src/applications/project/typeahead/PhabricatorProjectDatasource.php

@@ -67,7 +67,7 @@ final class PhabricatorProjectDatasource
         ->setDisplayType(pht('Project'))
         ->setURI('/tag/'.$proj->getPrimarySlug().'/')
         ->setPHID($proj->getPHID())
-        ->setIcon($proj->getIcon())
+        ->setIcon($proj->getDisplayIconIcon())
         ->setColor($proj->getColor())
         ->setPriorityType('proj')
         ->setClosed($closed);