minor

git-svn-id: http://haxe.googlecode.com/svn/trunk@6041 f16182fa-f095-11de-8f43-4547254af6c6
fixed exists return type

git-svn-id: http://haxe.googlecode.com/svn/trunk@6042 f16182fa-f095-11de-8f43-4547254af6c6