No line spacing when using drawline

Changed my drawString override function to clearRect the area where the string is going to be displayed.

Not extensively tested, but seems to work ok for me. It saves a lot of clearRects in my code :-)

Comments and suggestions welcome!

Code is like this:

// override drawString function to:
// - allocate proper line spacing between successive lines
// - clear the area where the string will be displayed
g._ds = g.drawString;
g.drawString = function(s,x,y) {
  s=s.toString();
  sa=s.split("\n");
  spacing=5+g.getFontHeight();
  sa.forEach(function(line){
    // clear the area where the string will be written
    g.clearRect(x,y,x+g.stringWidth(line), y + spacing);
    // now call the original drawString
    g._ds(line,x,y);
    y+=spacing;
  });      
};