Issue #6338

It looks like there was a logic error in the code that was causing it
to break out of the event deletion loop early when deleting events for
the last (or only) segment in a recording. (In this case, last_index
is -1, so i >= last_index is always true).

The trim_events_for call was always succeeding, so the events were
being removed from the event list (meeting:{ID}:recordings key) even
though the events themselves hadn't been deleted in the loop.

I've moved the trim_events_for call to below the event deletion loop
to ensure that if the archive script is interrupted, the events list
will contain all not-yet-deleted events.