Initialize variables that we attempt to free later.

(closes issue #16302)
 Reported by: yahsyn
 Patches: 
       20091124__issue16302.diff.txt uploaded by tilghman (license 14)
 Tested by: yahsyn


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@238754 65c4cc65-6c06-0410-ace0-fbb531ad65f3