fix(client): Fix a bug that if block of pages not working

src/client/components/page/page.if.vue

 <template>
-<div v-show="script.vars[value.var]">
+<div v-show="hpml.vars[value.var]">
 	<x-block v-for="child in value.children" :value="child" :page="page" :hpml="hpml" :key="child.id" :h="h"/>
 </div>
 </template>