Merged revisions 48391 via svnmerge from

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

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r48391 | file | 2006-12-11 16:31:23 -0500 (Mon, 11 Dec 2006) | 2 lines

Return non-existant callerid handling to that which it was before. In 1.4 and trunk callerid can be allocated but not have any contents so we have to use ast_strlen_zero before passing it to the relevant functions. (issue #8567 reported by pabelanger)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@48392 65c4cc65-6c06-0410-ace0-fbb531ad65f3