fix bug

mallinkService/src/main/java/com/iformall/service/impl/WxCouponOrderServiceImpl.java

@@ -767,7 +767,7 @@ public class WxCouponOrderServiceImpl implements WxCouponOrderService {
     		}
     		
     		Map<Long, List<WxMerchantVo>> couponMerchantVoMap = null;
-    		if (getMerchant) {
+    		if (getMerchant && couponIds.size() > 0) {
     			couponMerchantVoMap = wxMerchantService.findCouponMerchantVoList(couponIds, tenantEntity,false);
     		}