message: Add null check for detectionResultColumns
diff: @@ -195,6 +195,10 @@ export default /*final*/ class DetectionResult {
  }
  private adjustRowNumbers(barcodeColumn: int, codewordsRow: int, codewords: Codeword[]): void {
  + if (this.detectionResultColumns[barcodeColumn - 1] == null) {
  + return;
  + }
  +
  let codeword: Codeword = codewords[codewordsRow];
  let previousColumnCodewords: Codeword[] = this.detectionResultColumns[barcodeColumn - 1].getCodewords();
  let nextColumnCodewords: Codeword[] = previousColumnCodewords;
  