fix 学生不存在时候加课报错

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

@@ -68,8 +68,7 @@ public class SporadicChargeInfoImpl extends BaseServiceImpl<Integer, SporadicCha
 		if(studentPaymentOrder.getStatus() == DealStatusEnum.SUCCESS){
 			//活动，增加课程余额
 			if(info.getChargeType().equals("6")){
-				BigDecimal courseBalance = info.getAmount().subtract(info.getDiscountAmount());
-				sysUserCashAccountService.appendCourseBalance(userId,courseBalance);
+				sysUserCashAccountService.appendCourseBalance(userId,studentPaymentOrder.getActualAmount());
 			}
 			sysMessageService.batchSendMessage(MessageSenderPluginContext.MessageSender.JIGUANG, MessageTypeEnum.SMS_SPORADIC_PAYMENT_SUCCESS, map, null, 0, "1",
 					studentPaymentOrder.getActualAmount(),info.getTitle());