[mew-int 2866] Change of emacs state when sending mail

Evaluating the form

(unencodable-char-position 0 5 'iso-latin-1-unix 1 "100 Ω")

normally returns the list (4), since capital Omega is not encodable in
latin-1. However, after I use mew to send email, the form begins to
return nil instead.

As a result, select-safe-coding-system-interactively no longer works,
which is a bit annoying when I mistakenly try to save a file in the
latin-1 coding which cannot be so encoded.

Here is the relevant excerpt from mew-config-alist:

	 (default
	   (ssl-verify-level 1)
	   (ssl-cert-directory "~/.certs")
	   (smtp-server "secure.math.ntnu.no")
	   (smtp-ssl t)
	   (smtp-port "587")
	   (smtp-ssl-port "587")
	   (smtp-user "hanche"))

- Harald