* fold-const.c optimze_bit_field_compare): Initialize rnbitpos,
        rnbitsize, rnmode and rinner.
        (make_range): Initialize type.
        (fold): Initialize arg0, arg1 and varop.
        * function.c (instantiate_virtual_regs_1): Initialize offset, regnoi
        and regnor.
        (expand_function_start): Initialize last_ptr.
        * stor-layout.c (layout_record): Initialize desired_align.
        (get_best_mode): Initialize unit.
        * tree.c (copy_node): Initialize length.

From-SVN: r18943