I've committed this patch.

Is there going to be another gdb-5.3.x release? If so, I'd like to
commit this to the branch.

Ted Roth

2003-03-04  Theodore A. Roth  <troth@openavr.org>

    * gdb/avr-tdep.c (avr_io_reg_read_command): Fix to handle case when the
    number of io registers reported by remote target is not a multiple of
    step.