Folder scan doesn't work

[ghost]

Crash when trying to scan, oops:

@@@
Application Identifier: com.hardcoded_software.dupeguru
Application Version: 3.1.1

Traceback (most recent call last):
File "hscommon/cocoa/init.pyc", line 53, in _async_run
File "core/app.pyc", line 374, in do
File "core/directories.pyc", line 140, in get_folders
TypeError: _get_folders() takes exactly 2 positional arguments (3 given)
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[ghost]

(from [8fb1050f2706]) [#172 state:fixed] Fixed the Folders scan type which didn't work at all.
https://bitbucket.org/hsoft/dupeguru/changeset/8fb1050f2706/