Function decode_audit_log_record_at 

pub fn decode_audit_log_record_at(
    data: &[u8],
    offset: usize,
) -> Result<(BACnetAuditLogRecord, usize), Error>

Decode one bare BACnetAuditLogRecord starting at offset, returning it and the offset just past it, so the records of a ReadRange item list decode one after another.