Merged revisions 128856 via svnmerge from

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

........
r128856 | tilghman | 2008-07-07 19:01:30 -0500 (Mon, 07 Jul 2008) | 7 lines

Check for non-NULL before stripping characters.
(closes issue #12954)
 Reported by: bfsworks
 Patches: 
       20080701__bug12954.diff.txt uploaded by Corydon76 (license 14)
 Tested by: deti

........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@128857 65c4cc65-6c06-0410-ace0-fbb531ad65f3