obshashrange: clear in-memory cache alongside the sqlite one
Clearing on disk data in nice, but we also need to remove in memory one or we'll
get incorrect results.
This software was downloaded from
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Copyright 2011 Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
Logilab SA <contact@logilab.fr>
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
Patrick Mezard <patrick@mezard.eu>
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