bug: [none] fixAnswerNull

pcloud-service-book/src/main/java/com/pcloud/book/applet/biz/impl/AnswerSubscribeBizImpl.java

@@ -257,7 +257,7 @@ public class AnswerSubscribeBizImpl implements AnswerSubscribeBiz {
         answerSubscribeUserDTO.setChannelId(popup.getChannelId());
         answerSubscribeUserDTO.setAdviserId(popup.getAdviserId());
         //已关注公众号
-        if (popup.getSubscribeType() == 1) {
+        if (null != popup.getSubscribeType() && popup.getSubscribeType() == 1) {
             //推送链接
             answerSubscribeUserDTO.setUrl(getResourcePageUrl(popup.getBookId(), popup.getAdviserId(), popup.getChannelId()));
         }