cdr.c: Add missing aow_unlock(cdr) in off nominal path of handle_dial_message().

* Trivial common code hoisting in handle_bridge_leave_message().

* Some whitespace fixing.


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/12@410541 f38db490-d61c-443f-a65b-d21fe96a405b