[RFA:] Fix lsb? bug with insn fields beyond base insn size.

[Hans-Peter Nilsson]

> From: Doug Evans <dje@transmeta.com>
> Date: Fri, 21 Jun 2002 12:13:19 -0700 (PDT)

> Not something of your making, but one thing that can be cleaned
> up in -gen-extract-word is it's use of current-arch-insn-lsb0?.
> Either it should use the lsb0? argument, or the lsb0? argument
> should be removed.  I don't have a strong preference which.

I'll convert it to use the lsb0? argument.

brgds, H-P