update

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

@@ -774,7 +774,7 @@ public class MusicGroupServiceImpl extends BaseServiceImpl<String, MusicGroup> i
 
         studentPaymentOrderDetailService.batchAdd(studentPaymentOrderDetailList);
         
-        if(isUseBalancePayment){
+        if(isUseBalancePayment || amount.doubleValue() == 0){
         	SysUserCashAccount userCashAccount = sysUserCashAccountService.getLocked(userId);
         	if(userCashAccount == null){
         		throw new BizException("用户账户找不到");