c-warn.c (check_address_or_pointer_of_packed_member): Handle the case when rhs is of array type correctly.

2019-01-28  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * c-warn.c (check_address_or_pointer_of_packed_member): Handle the case
        when rhs is of array type correctly.  Fix handling of nested structures.
        Fix handling of indirect_ref together with nop_expr and/or addr_expr.
        (check_and_warn_address_or_pointer_of_packed_member): Fix handling of
        type casts within nested compound expressions.

testsuite:
2019-01-28  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * c-c++-common/Waddress-of-packed-member-1.c: Extended test case.
        * c-c++-common/Waddress-of-packed-member-2.c: New test case.

From-SVN: r268337