add rport hack to sofia lib to ease NAT suffering

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@8497 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/sofia-sip/.update

-Mon May 19 12:56:22 EDT 2008
+Wed May 21 00:25:55 CEST 2008

libs/sofia-sip/libsofia-sip-ua/nta/nta.c

@@ -2579,6 +2579,10 @@ int agent_check_request_via(nta_agent_t *agent,
     rport = su_sprintf(msg_home(msg), "rport=%u", ntohs(from->su_port));
     msg_header_replace_param(msg_home(msg), v->v_common, rport);
   }
+  else {
+    rport = su_sprintf(msg_home(msg), "rport=%u", ntohs(from->su_port));
+    msg_header_replace_param(msg_home(msg), v->v_common, rport);
+  } 
 
   return 0;
 }