bug#8719: ccl: add some integer overflow checks

[Kenichi Handa]

In article <4DDA0467.4050205@cs.ucla.edu>, Paul Eggert <eggert@cs.ucla.edu> 
writes:

> I did a quick pass through ccl.c and found several places where
> integer overflow could cause problems.  Here's a proposed fix for some
> of the problems.

> Does anybody have a good suggestion for testing these?  I'm no
> expert in CCL.

Thank you.  I'll check it (perhaps within this week).

---
Kenichi Handa
handa@m17n.org