Conpherence - fix no conpherences fatal

Summary: Fixes T3087. I guess I didn't load up the actual Conpherence UI last time I was in here with my 'noconpherences' user. :/

Test Plan: noconpherences user loaded /conpherence/ with no error

Reviewers: epriestley, chad

Reviewed By: chad

CC: aran, Korvin

Maniphest Tasks: T3087

Differential Revision: https://secure.phabricator.com/D5815

Author: bobtrahan

src/applications/conpherence/controller/ConpherenceListController.php

@@ -228,16 +228,17 @@ private function loadParticipationWithMidCursor(
   private function loadConpherenceThreadData($participation) {
     $user = $this->getRequest()->getUser();
     $conpherence_phids = array_keys($participation);
+    $conpherences = array();
     if ($conpherence_phids) {
       $conpherences = id(new ConpherenceThreadQuery())
         ->setViewer($user)
         ->withPHIDs($conpherence_phids)
         ->needParticipantCache(true)
         ->execute();
-    }
 
-    // this will re-sort by participation data
-    $conpherences = array_select_keys($conpherences, $conpherence_phids);
+      // this will re-sort by participation data
+      $conpherences = array_select_keys($conpherences, $conpherence_phids);
+    }
 
     return $conpherences;
   }