Code review comment for lp:~ralsina/ubuntuone-control-panel/go-native

When opening the file choose from the Folders tab, I'm getting:

  File "/home/nessita/canonical/controlpanel/review_go-native/ubuntuone/controlpanel/gui/qt/__init__.py", line 94, in inner
    res = yield f(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 1039, in _inlineCallbacks
    result = g.send(result)
  File "/home/nessita/canonical/controlpanel/review_go-native/ubuntuone/controlpanel/gui/qt/addfolder.py", line 61, in on_clicked
    options=FILE_CHOOSER_OPTIONS)
TypeError: QFileDialog.getExistingDirectory(QWidget parent=None, QString caption=QString(), QString directory=QString(), QFileDialog.Options options=QFileDialog.ShowDirsOnly): argument 'options' has unexpected type 'int'