function.c (purge_addressof_1): Fix typo in inequality: do bitfield optimization for equal mode sizes.

        * function.c (purge_addressof_1): Fix typo in inequality: do
        bitfield optimization for equal mode sizes.
        * expmed.c (store_bit_field): Don't take subregs of subregs in
        the movstrict case.  Tidy a potential problem in the multi-word case.
        (extract_bit_field): Likewise.

From-SVN: r23066