fixed 会员登录bug

fuint-application/src/main/java/com/fuint/common/service/impl/MemberServiceImpl.java

@@ -642,7 +642,9 @@ public class MemberServiceImpl extends ServiceImpl<MtUserMapper, MtUser> impleme
         // 手机号已经存在
         if (StringUtil.isNotEmpty(mobile) && user == null) {
             user = queryMemberByMobile(merchantId, mobile);
-            user.setOpenId(openId);
+            if (user != null) {
+                user.setOpenId(openId);
+            }
         }
 
         if (user == null) {