[cpp] do not call Class function pointers directly

git-svn-id: http://haxe.googlecode.com/svn/trunk@6579 f16182fa-f095-11de-8f43-4547254af6c6
[cpp] remove debug

git-svn-id: http://haxe.googlecode.com/svn/trunk@6580 f16182fa-f095-11de-8f43-4547254af6c6