Fix for 32 bit C++ compile error.

With strict error checking, 32 bit compiles on some platforms fail with
the error:

    "error: this decimal constant is unsigned only in ISO C90"

This patch fixes the error by adding the "u" unsigned qualifier to the
integers.

Author: daniel@pocock.pro

R=jia.shao.peng@gmail.com
BUG=

Review URL: https://codereview.appspot.com/123610044


git-svn-id: http://libphonenumber.googlecode.com/svn/trunk@686 ee073f10-1060-11df-b6a4-87a95322a99c