allow access to all public fields of the underlying type inside an abstract

git-svn-id: http://haxe.googlecode.com/svn/trunk@5943 f16182fa-f095-11de-8f43-4547254af6c6
report missing this assignment in abstract constructor (fixed issue #1413)

git-svn-id: http://haxe.googlecode.com/svn/trunk@5944 f16182fa-f095-11de-8f43-4547254af6c6