webnium/flagrate — pull request #23 by townewgokgok (2014-01-08 03:14:15+00:00)
Title: Fixed zero as number for sortAlt was ignored

Please note that behavior will change much.
Which is better?

```javascript
'sortAlt' in a.cell[key] ? ...
```
```javascript
typeof a.cell[key].sortAlt != 'undefined' ? ...
```