Hamish Friedlander e5bf1473d6 BUG Make process_dirty_indexes act cleanly
process_dirty_indexes wasnt saving variant state or restoring or exit, because
I thought it was only called at the end of a request and so didnt need to

But tests call it regularly throughout a request. So now its clean
and safe to call when-ever
2012-07-19 17:07:48 +12:00
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