* nta.c: check input in nta_leg_by_uri()
  Ignore-this: f149ac04b5e1bf078c3b00e837738301
  
  Coverity issue.


git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13330 d0543943-73ff-0310-b7d9-9358b9ac24b2