When a device registers to use it is entirely possible that they may be in...

When a device registers to use it is entirely possible that they may be in use, so tell the core that we don't know the devstate and have it ask us for it.
(closes issue #13525)
Reported by: pj


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@162997 65c4cc65-6c06-0410-ace0-fbb531ad65f3