[PATCH] Prevent a crash if the ASCII charset registries match nothing

[stephen at xemacs.org]

QUERY

What's the big hurry?

Aidan Kehoe writes:

 > Eh, still, XEmacs shouldn?t be crashable from Lisp. The below has a bit more
 > testing, with X11 and GTK; I intend committing it this evening.

The crash you're describing is the well-known exit-via-X-handler on
startup, is it not?  You really need to replace the X error handler to
prevent that.

Making things a little bit better for people with misconfigured
systems at the expense of breaking Ilya's hacks is not a good tradeoff
IMO.