Record the previous port in the temporary address structure so that the...

Record the previous port in the temporary address structure so that the comparison does not treat the host as having changed even if it did not. This would have been uninitialized before and would have led to a baddddd port.
(closes issue #13628)
Reported by: pananix
Patches:
      bug13628.patch uploaded by jpeeler (license 325)
Tested by: file, blitzrage


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@166268 65c4cc65-6c06-0410-ace0-fbb531ad65f3