fix #33

issue arising from mainnet-tx:6dd08f9cec8fe67ecea970e1ac0c4963950a0900628fccfb29493be02efaf828
non-standard tx with a zero amount utxo

Author: setavenger

src/common/types/utxo.go

@@ -158,11 +158,11 @@ func FindBiggestRemainingUTXO(utxoSpent UTXO, utxos []UTXO) (*uint64, error) {
 	}
 
 	if spentIsMax {
-		if valueMax == 0 {
-			common.ErrorLogger.Printf("%+v", utxoSpent)
-			common.ErrorLogger.Printf("%+v", utxos)
-			return nil, errors.New("valueMax was 0. this should not happen")
-		}
+		// if valueMax == 0 {
+		// 	common.ErrorLogger.Printf("%+v", utxoSpent)
+		// 	common.ErrorLogger.Printf("%+v", utxos)
+		// 	return nil, errors.New("valueMax was 0. this should not happen")
+		// }
 		// If the spent UTXO was the largest, return the max value among the remaining UTXOs.
 		return &valueMax, nil
 	} else {