Hi,
This patch fixes a couple of problems with the remote protcol handling

1) remote_fetch_registers checks to see things have not got out of
sync, but it does not deal with upper case hex characters and so can get
confused

2) remote_write_bytes attempts to honour get_memory_write_packet_size's
limit, but fails in two ways when that is a very small number.  a) it can
end up with a negative byte count. b) it deducts the number of chars in
the *maximal* length count, not the number of chars in the actual length
count.  This can result in packets sending 1 or 2 bytes fewer than they
are limited to.

built & tested on i686-pc-linux-gnu and an unreleased architecture. ok?

nathan
-- 
Nathan Sidwell    ::   http://www.codesourcery.com   ::     CodeSourcery LLC
nathan@codesourcery.com    ::     http://www.planetfall.pwp.blueyonder.co.uk