* c-typeck.c (build_unary_op): Don't expand ADDR_EXPR of a
        COMPONENT_REF to pointer arithmetic.
        * varasm.c (initializer_constant_valid_p): Allow "&(*c).f", for
        constant "c" as a valid constant initializer.  Allow narrowing of
        differences against the same base object, for any base object.

From-SVN: r86794