client: fix bug marking all sent events as encrypted

lib/client.js

@@ -941,11 +941,12 @@ MatrixClient.prototype.sendEvent = function(roomId, eventType, content, txnId,
             );
             localEvent.encryptedType = "m.room.encrypted";
             localEvent.encryptedContent = encryptedContent;
-        }
+
             // TODO: Specify this in the event constructor rather than fiddling
             // with the event object internals.
             localEvent.encrypted = true;
         }
+    }
 
     return _sendEvent(this, room, localEvent, callback);
 };