SciLifeLab/status — pull request #140 by guillermo-carrasco (2014-11-04 10:17:28+00:00)
Title: BUGFIX: check if there are value, not the value itself

Otherwise if the quota usage is 0, it will evaluate to `False` and there will be an exception when trying to assign

```python
data.append({"x": int(time.mktime(parser.parse(date_getter(row)).timetuple())),
"y": y * gb,
"limit": limit * gb})
```