update 进行中乐团新增学生

mec-biz/src/main/java/com/ym/mec/biz/service/impl/StudentRegistrationServiceImpl.java

@@ -737,7 +737,7 @@ public class StudentRegistrationServiceImpl extends BaseServiceImpl<Long, Studen
             if (musicGroup.getOwnershipType() != null && musicGroup.getOwnershipType() == CooperationOrgan.OwnershipType.OWN) {
                 Map<Integer, String> receivers = new HashMap<>(1);
                 receivers.put(studentRegistration.getUserId(), studentRegistration.getParentsPhone());
-                if (reduce == BigDecimal.ZERO) {
+                if (reduce.compareTo(BigDecimal.ZERO) == 0) {
                     sysMessageService.batchSendMessage(MessageSenderPluginContext.MessageSender.AWSMS, MessageTypeEnum.SMS_MUSIC_GROUP_ADD_STUDENT_FREE,
                             receivers, null, 0, null, "", studentRegistration.getParentsName(), studentRegistration.getName(), musicGroup.getName());
                 } else {