fix(places/SearchBox): undefined child at unmount

Google Maps Api error can cause removal of searchBox which can results into an error at unmount while trying to append undefined to containerElement

Author: Hemant-yadav

src/macros/places/SearchBox.jsx

@@ -145,7 +145,9 @@ export class SearchBox extends React.PureComponent {
  const child = this.context[MAP].controls[
  this.props.controlPosition
  ].removeAt(this.mountControlIndex)
- this.containerElement.appendChild(child)
+ if(child !== undefined){
+ this.containerElement.appendChild(child)
+ }
  }
  }