Tell the device state core a change happened when a channel is freed but not a specific state.

We need to do this because while we know that the freeing of the channel may cause something to become
not in use we do not know this for sure. There may be another channel that is still up which would cause
it to be in use.
(closes issue #13238)
Reported by: kowalma
Patches:
      20090121__bug13238.diff.txt uploaded by Corydon76 (license 14)
Tested by: alecdavis


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@174844 65c4cc65-6c06-0410-ace0-fbb531ad65f3