Also correct the callinfo provided in skinny_answer.

(closes issue #17876)
Reported by: salecha
Patches:
      skinny_cnd3.diff uploaded by wedhorn (license 30)
Tested by: salecha, wedhorn

Review: NA 


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@283287 65c4cc65-6c06-0410-ace0-fbb531ad65f3