This solves a crash in the cdr_tds module on 'stop gracefully', for situations...

This solves a crash in the cdr_tds module on 'stop gracefully', for situations where 'settings' is not set to a pointer

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@123446 65c4cc65-6c06-0410-ace0-fbb531ad65f3