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

[Aidan Kehoe]

 Ar an tri? l? d?ag de m? na Samhain, scr?obh stephen at xemacs.org: 

 >  >  > QUERY
 >  >  > 
 >  >  > What's the big hurry?
 >  > 
 >  > Where is everyone getting the impression I?m in a hurry? 
 > 
 > I don't speak for anybody else in this.  IMO "I'll commit this
 > tonight" is a *big* hurry, for those of us who should be reviewing.

I had posted a first draft of the patch Wednesday, in
17746.1739.273694.339710 at parhasard.net . I committed it Sunday. The patch
itself is only relevant to people with the bad sense to call
(set-charset-registries 'ascii ["nothing-sensible"])--for the vast, vast
majority of users it?s irrelevant. It didn?t seem to me to need much
discussion; I appear to have been wrong in this. 

In contrast, I posted two more debatable patches yesterday with no time
frame for a commit. I posted a patch today with no time frame for a commit. 
I suspect I?ll post one tomorrow.

-- 
Santa Maradona, priez pour moi!