pculture/miro — pull request #310 by paulswartz (2012-03-30 17:06:47+00:00)
Title: bz18914. don't show read-only devices

If we can't write to the root of the device, don't bother creating a database
or even showing it to the user. This prevents lock errors on SQLite (can't
lock something on a read-only device on Windows), and saves CPU since we won't
scan the device.