In journal_file_next_entry(), if the passed offset matches an entry object, then generic_array_bisect() returns the object, but the object we requested is the next (or previous) object. Hence, we should not validate the object returned by generic_array_bisect(), otherwise it may fail when the journal is corrupted. Note the validity of the entry object that should be returned by journal_file_next_entry() will be checked in the following generic_array_get(). So, when journal_file_next_entry() succeeds, the returned object is always validated.
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