器件选型跳转至类目详情页，如果类目为空页面报错问题处理

components/product/CategoryProperty.vue

@@ -1,6 +1,6 @@
 <template>
   <div class="main-content container">
-    <div class="selector" v-if="!kind.leaf">
+    <div class="selector" v-if="kind && !kind.leaf">
       <div class="sl-wrap" >
         <div class="sl-key">
           <span>分类：</span>
@@ -14,7 +14,7 @@
         </div>
       </div>
     </div>
-    <div class="div-table" split-dropdown v-if="kind.leaf">
+    <div class="div-table" split-dropdown v-if="kind && kind.leaf">
       <div class="div-table-left">
         <table class="table table-bordered">
           <thead >