Merged revisions 195520 via svnmerge from

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

........
  r195520 | tilghman | 2009-05-19 15:12:20 -0500 (Tue, 19 May 2009) | 7 lines
  
  Ensure thread keys are initialized before attempting to access them.
  (closes issue #14889)
   Reported by: jaroth
   Patches: 
         app_voicemail.c.patch uploaded by msirota (license 758)
   Tested by: msirota, BlargMaN
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@195521 65c4cc65-6c06-0410-ace0-fbb531ad65f3