Main fix: Fixing a bug which caused VoiceMailMain to always report that

you had 0 messages when using IMAP storage.

Secondary fixes: adding locks to list access in several places

Big thanks to Russell Bryant for helping out with this.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@70530 65c4cc65-6c06-0410-ace0-fbb531ad65f3