Wrapped window reference with is-defined check for server side rendering
Wrapped window reference with is-defined check for server side rendering

Also avoid unnecessary state update if height is correct (because component was mounted in the browser).

cesarandreu/react-virtualized,edulan/react-virtualized,cesarandreu/react-virtualized,bvaughn/react-virtualized,bvaughn/react-virtualized,edulan/react-virtualized