message: fix(sdk-coin-celo): sanitize input
  Ticket:
diff: @@ -40,7 +40,7 @@ export class CeloTransaction {
  * @returns sanitized value
  */
  private sanitizeHexString(numberValue) {
  - if (numberValue === '0x0') {
  + if (numberValue === '0x0' || numberValue == '') {
  return '0x';
  } else if (numberValue.length % 2 === 0) {
  return numberValue;
  @@ -52,7 +52,7 @@ export class CeloTransaction {
  this.nonce = unpadBuffer(toBuffer(tx.nonce));
  this.gasLimit = toBuffer(this.sanitizeHexString(tx.gasLimit));
  this.gasPrice = toBuffer(this.sanitizeHexString(tx.gasPrice));
  - this.data = toBuffer(tx.data);
  + this.data = toBuffer(this.sanitizeHexString(tx.data));
  this.value = toBuffer(this.sanitizeHexString(tx.value));
  if (tx.to) {
  this.to = toBuffer(tx.to);
  