hasExpiry update

update.go

// Iterate through all unmined credits and update stored serializations
	unminedCreditsBucket := txmgrBucket.NestedReadWriteBucket(bucketUnminedCredits)
	unminedCursor := unminedCreditsBucket.ReadWriteCursor()
	for k, v := unminedCursor.First(); v != nil; k, v = unminedCursor.Next() {
		vCpy := make([]byte, len(v))
		copy(vCpy, v)
		
		hash, err := chainhash.NewHash(extractRawUnminedCreditTxHash(k))
		if err != nil {
			return err
		}
		
		recV := existsRawUnmined(txmgrBucket, hash[:])
		record := &TxRecord{}
		err = readRawTxRecord(hash, recV, record)
		if err != nil {
			return err
		}

		// set the hasexpiry flag if the tx has an expiry value set
		if record.MsgTx.Expiry != wire.NoExpiryValue {
			vCpy[8] |= 1 << 4
			
			err = unminedCreditsBucket.Put(k, vCpy)
			if err != nil {
				return err
			}
		}
	}