fix: 报名信息页面，行政区划ID为空时不请求区域接口

src/views/modules/activity/info.vue

@@ -136,6 +136,7 @@ export default {
       this.$router.push({ name: 'activity-list' })
     },
     getSSQ (code, key) {
+      if (!code) return
       this.$http.get('/sys/region/' + code).then(({ data: res }) => {
         if (res.code !== 0) return this.$message.error(res.msg)
         this[key] = res.data.name