优化了联想公司无选择的情况

src/views/roadshow_manage/compononts/sellerAddAct.vue

@@ -171,6 +171,7 @@ export default {
 
     // 确认按钮
     async confirm() {
+      if(!this.formData.companyId) return this.formData.companyName = ''
       await this.$refs.form.validate();
       const res = await roadshowInterence.ficcAddActivity({
         ActivityType: this.formData.activityType, //活动类型