Merged revisions 71289 via svnmerge from

Merged revisions 71289 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4

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r71289 | tilghman | 2007-06-24 12:39:34 -0500 (Sun, 24 Jun 2007) | 10 lines

Merged revisions 71288 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.2

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r71288 | tilghman | 2007-06-24 12:32:21 -0500 (Sun, 24 Jun 2007) | 2 lines

Issue 10043 - There is a legitimate need to be able to set variables to the empty string.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@71290 65c4cc65-6c06-0410-ace0-fbb531ad65f3