give error on macro property accessor (fixed issue #1444)

git-svn-id: http://haxe.googlecode.com/svn/trunk@6052 f16182fa-f095-11de-8f43-4547254af6c6
handle abstract casts in macro context

git-svn-id: http://haxe.googlecode.com/svn/trunk@6053 f16182fa-f095-11de-8f43-4547254af6c6