With the switch to the ast_sched_replace* API in trunk, we lose the correction

that was just merged from 1.4, so this is a changeover to those APIs to use the
macro versions, so that we properly detect errors from ast_sched_del, instead
of simply ignoring the return values.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@100497 65c4cc65-6c06-0410-ace0-fbb531ad65f3