* nua_stack_ack(), nua_invite_client_ack(): cleaned code
  Ignore-this: 9edf1594e20f27f4e2effb43c83858ea
    
  Fixed clean-up after ACK.
  
  Coverity issue.



git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13353 d0543943-73ff-0310-b7d9-9358b9ac24b2