vue-check-view does not trigger if height of div is 0

[igorbuts]

Version:

"vue-check-view": "^0.3.0"

Steps to reproduce:

1. Render the code below in your component:

   
   <template>
   <div v-view.once="onceHandler" class="wrapper">
   <div v-if="data" class="content">
   </div>
   </div>
   </template>

:x: **Actual result:**
 vue-check-view does not trigger: classes in the dom are not updated and  `onceHandler` is not called.

 :white_check_mark: **Expected result:**
vue-check-view is triggering.

---
if I try this workaround:

it starts working. But IMO it should work without this workaround even when the target div height is 0.