修复书没有被版权保护时接口报错的bug

pcloud-service-book/src/main/java/com/pcloud/book/copyright/biz/impl/BookAuthInfoBizImpl.java

@@ -424,6 +424,10 @@ public class BookAuthInfoBizImpl implements BookAuthInfoBiz {
     @ParamLog("获取正版授权书基本信息与服务")
     public BookAuthInfoAndServesVO getInfoAndServesByBook(Long bookId, Long channelId, Long adviserId, Integer authBookType) {
         BookAuthInfoVO bookAuthInfoVO = getInfoByBook(bookId, channelId, adviserId, authBookType);
+        if(bookAuthInfoVO == null) {
+            return null;
+        }
+
         BookAuthInfoAndServesVO bookAuthInfoAndServesVO = new BookAuthInfoAndServesVO();
         BeanUtils.copyProperties(bookAuthInfoVO, bookAuthInfoAndServesVO);
         if(authBookType == null || AuthBookTypeEnum.PAPER_BOOK.value.equals(authBookType)) {