Merged revisions 97192 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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r97192 | mmichelson | 2008-01-08 14:42:07 -0600 (Tue, 08 Jan 2008) | 9 lines

Making some changes designed to not allow for a corrupted mailstream for a vm_state.

1. Add locking to the vm_state retrieval functions so that no linked list corruption occurs.
2. Make sure to always grab the persistent vm_state when mailstream access is necessary.
3. Correct an incorrect return value in the init_mailstream function.

(closes issue #11304, reported by dwhite)


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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@97193 65c4cc65-6c06-0410-ace0-fbb531ad65f3