toTextArea fails with status = false

[phw]

If the statusbar is disabled with the status = false option simplemde.toTextArea will fail with:

Error: Argument 1 of Node.removeChild is not an object.

This is easy to reproduce. This will work:

var simplemde = new SimpleMDE();
simplemde.toTextArea();

This not:

var simplemde = new SimpleMDE({
  status: false
});
simplemde.toTextArea();