Merged revisions 167432 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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r167432 | russell | 2009-01-07 11:29:53 -0600 (Wed, 07 Jan 2009) | 4 lines

Treat an empty string the same way as a NULL country argument.

In passing, simplify the handling of returning a default tone zone.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@167442 65c4cc65-6c06-0410-ace0-fbb531ad65f3