Fix a small threading issue with PhoneNumberUtil.java

JAVA: Fix a small threading issue with PhoneNumberUtil.java
Committed: http://code.google.com/p/libphonenumber/source/detail?r=359

[shaopengjia, 2011-09-27 07:12:47]

Hello Philippe,

I would like you to do a code review here.

Thanks,

Shaopeng

[philippe, 2011-09-27 07:27:05]

On 2011/09/27 07:12:47, shaopengjia wrote:
> Hello Philippe,
> 
> I would like you to do a code review here.
> 
> Thanks,
> 
> Shaopeng

LGTM.

[shaopengjia, 2011-09-27 07:57:59]

Committed as r 359. Closing issue.