update

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

@@ -944,6 +944,9 @@ public class SubjectChangeServiceImpl extends BaseServiceImpl<Integer, SubjectCh
         goodies.add(subjectChange.getChangeMusicalGoods());
         
         for (Goods goods : goodies) {
+        	if(goods == null){
+        		continue;
+        	}
             goodsPrice = goodsPrice.add(goods.getDiscountPrice());
         }
         subjectChange.setChangeCost(goodsPrice);