Fixes a crash on Solaris.
(closes issue #16572)
 Reported by: crjw
 Patches: 
       frame_changes.patch uploaded by crjw (license 963)
       Plus several others found and fixed by me


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@239074 65c4cc65-6c06-0410-ace0-fbb531ad65f3