Don't unref user twice on failure. Also, when adding sorted list of users, it...

Don't unref user twice on failure.  Also, when adding sorted list of users, it is best to check the entry already in the list for a "next" entry instead of the newly created entry...


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@114124 65c4cc65-6c06-0410-ace0-fbb531ad65f3