Fix bug in HtmlInternalTransform.clone().
Fix bug in HtmlInternalTransform.clone().

tinkerstudent/playn,rachelharvey/playn,longtaoge/playn,tinkerstudent/playn,thecocce/playn-1,thecocce/playn-1,playn/playn,rachelharvey/playn,playn/playn,ruslansennov/playn2,playn/playn,longtaoge/playn,ruslansennov/playn2