Enhancement: moved packet debug output to one function

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5798 43c1dc8c-776e-4df2-8ef1-6e829299be21
Enhancement: Use sccp_channel_updateMediaTransmission instead of sccp_channel_startMediaTransmission to make sure mediatransmission is stopped before starting again (if already started)

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5799 43c1dc8c-776e-4df2-8ef1-6e829299be21
Fix: Added mutex_destroy channel->scheduler.lock

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5800 43c1dc8c-776e-4df2-8ef1-6e829299be21