Fix Transfer Issue Part 2: When the receiver of a transfered channel hangs up, without accepting the transfered channel, older SCCP phones would not display the callplane of the transfered call upon hangup (Reported by Sander Smeenk: 'Transfer Bug?'). Updated previous fix, to simulate sccp_channel_hold more closely and take care of the device refcount being of by +1

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4728 43c1dc8c-776e-4df2-8ef1-6e829299be21