bug204 优惠列表-复制，无价格信息

src/views/ecw/coupon/edit.vue

@@ -472,7 +472,7 @@ export default {
 					})
 				}
         console.log('lineIds', this.form.lineIds)
-        if (this.form.lineIds!=null) {
+        if (this.form.lineIds!=null&&this.form.lineIds.length != 0) {
           if(this.form.lineIds[0].channelId==0) {
             this.option.transportId = 1
           } else {