Minor CJK line break fix

Here's another minor fix to the character categorisation table used for line
breaking. It should be applied after the two patches attached to:

http://www.abisource.org/mailinglists/abiword-dev/2005/Mar/0439.html
http://www.abisource.org/mailinglists/abiword-dev/2005/Mar/0440.html

Would someone mind committing these three? They are all very simple and do not
change any code which I didn't originally write.

Best wishes,

R.