added missing assign check

git-svn-id: http://haxe.googlecode.com/svn/trunk@6142 f16182fa-f095-11de-8f43-4547254af6c6
removed haxe.EnumTools.getEnum

git-svn-id: http://haxe.googlecode.com/svn/trunk@6143 f16182fa-f095-11de-8f43-4547254af6c6