No line spacing when using drawline

@gerardwr can you come up with some code that causes the getModified(true) issue in the emulator and post it here? https://www.espruino.com/ide/emulator.html

Seems to work great for me:

>g.getModified(true)
={ x1: 0, y1: 0, x2: 239, y2: 239 }
>g.getModified(true)
=undefined
>g.drawString("Hello")
=Graphics: {
  flip: function () { [native code] }
 }
>g.getModified(true)
={ x1: 0, y1: 0, x2: 28, y2: 6 }
>g.getModified(true)
=undefined
>g.clear()
=Graphics: {
  flip: function () { [native code] }
 }
>g.getModified(true)
={ x1: 0, y1: 0, x2: 239, y2: 239 }
>g.getModified(true)
=undefined