pdf导入修复

srm-module-code/src/main/java/org/jeecg/modules/saleCode/util/PDFTableReader.java

@@ -341,6 +341,7 @@ public class PDFTableReader<T> {
             }
         }
 
+        if(titleRow == null) return new ArrayList<>();
         //根据titleRow和nextRow获取多行数据
         List<Float> collect = new ArrayList<>();
         if (nextRow != null) {