>
>  /* All Lisp_Object components must come first.
>     That ensures they are all aligned normally.  */
>
> and
>
>  /* Beyond here, there should be no more Lisp_Object components.  */
>
> Also see allocate_frame in alloc.c and make_frame in frame.c.
>


Great!. Pfff, I did not see it :(.


Alin.