Merged revisions 146799 via svnmerge from

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

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  r146799 | tilghman | 2008-10-06 15:52:04 -0500 (Mon, 06 Oct 2008) | 8 lines
  
  Dialplan functions should not actually return 0, unless they have modified the
  workspace.  To signal an error (and no change to the workspace), -1 should be
  returned instead.
  (closes issue #13340)
   Reported by: kryptolus
   Patches: 
         20080827__bug13340__2.diff.txt uploaded by Corydon76 (license 14)
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