DATA_ALIGNMENT vs. DECL_USER_ALIGNMENT

[Richard Kenner]

    I'm not sure whether this is the preferred fix; in particular
    I don't understand why those variables need to have forced 
    alignment in the first place ...

I think it needs more thought.  Ada semantics on alignment are quite
complex.  At first though, DECL_USER_ALIGN should either *always* be
set or *never* be set, but it's not clear which or even, yet, whether
that's correct or not.

I've started a discussion among the alignment experts in Ada.