add missing param in callback

Android WebView doesn't show when set style={{ width: ... }}

I have an issue when I set props style.width
<AutoHeightWebView
style={{ width: 300 }}
...
/>

In some case,  stage.height can update with null and WebView doesn't show.
I add some condition to check before an update stage.

Thank you!

  Robustness fix for clients returning weird stuff in the message data; Only insert wrapper element once; be able to use the component in a Typescript file;