fix for KANJI width.

Support for KANJI-character, please.

Attached 2 screnn-shot, before-fix and after-fix.
in the before-fix, some cell's width are incorrect.

- before-fix
![before-fix](https://f.cloud.github.com/assets/11354/348491/05155ea0-9f59-11e2-9ff6-fdf87e3bcd71.png)

- after-fix
![after-fix](https://f.cloud.github.com/assets/11354/348493/0bd57e82-9f59-11e2-8857-1644ce53dfa9.png)