Pass the PID of the Asterisk process, not the PID of the canary.

(closes issue #17065)
 Reported by: globalnetinc
 Patches: 
       astcanary.patch uploaded by makoto (license 38)
 Tested by: frawd, globalnetinc


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@255952 65c4cc65-6c06-0410-ace0-fbb531ad65f3