Fix Code.bodyString.
Fix Code.bodyString.

Function AST nodes now contain a scope, and not directly the Nary.

    * src/object/code-class.cc: Fetch the Nary inside the inner scope.

aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi