Crash upon quitting if the appdata folder has been deleted

[ghost]

If the appdata folder has been deleted while dupeGuru was running, quitting dupeGuru will result in a crash like this one:

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Application Identifier: com.hardcoded_software.dupeguru
Application Version: 2.9.1

Traceback (most recent call last):
File "/Applications/dupeGuru.app/Contents/Resources/dg_cocoa.plugin/Contents/Resources/dg_cocoa.py", line 72, in saveResults
File "core/app.pyc", line 216, in save
File "core/directories.pyc", line 150, in save_to_file
File "hsutil/files.pyc", line 34, in enter
File "hsutil/files.pyc", line 22, in open_if_filename
IOError: [Errno 2] No such file or directory: u'/Users/michaelblodgett/Library/Application Support/dupeGuru/last_directories.xml'
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[ghost]

Yup, I reproduced it.

[ghost]

(from [0dafba28b570]) [#83 state:fixed] Fixed crash on quitting if the appdata dir has been removed.
http://bitbucket.org/hsoft/dupeguru/changeset/0dafba28b570/