add report validation function code fixed bug --frank

atms-api/src/main/java/pwc/taxtech/atms/vat/service/impl/ReportGeneratorImpl.java

@@ -592,7 +592,7 @@ public class ReportGeneratorImpl {
      * @param workbook 工作簿
      */
     public void addFunctionsAndContext(Workbook workbook, String[] functions, FormulaContext formulaContext, Boolean isValidate) {
-        FreeRefFunction[] functionImpls = new FreeRefFunction[0];
+        FreeRefFunction[] functionImpls;
         if (!isValidate) {
             functionImpls = new FreeRefFunction[]{new SGSR(formulaContext), new FSJZ(formulaContext), new ND(formulaContext),
                     new BB(formulaContext), new XXFP(formulaContext), new GZSD(formulaContext), new PC(formulaContext)