Fix - tableView cellForRowAtIndexPath:

return a fake cell to prevent app from crashing.

Riot/ViewController/RoomParticipantsViewController.m

@@ -1123,6 +1123,11 @@
         
         cell = participantCell;
     }
+    else
+    {
+        // Return a fake cell to prevent app from crashing.
+        cell = [[UITableViewCell alloc] init];
+    }
     
     return cell;
 }