[ns] udp agent bug ? and patch

[Neundorf Alexander <Alexander.Neundorf.extern@icn.siemens.de>]

Hi, 

there seems to be an obvious bug in the udp agent up to version 2.1b8. If the incoming packets are larger than the udp packet size, it creates enough packets to send them all, but enters the size only in the last packet.

Bye
Alex

*** udp.mod.cc	Tue Aug  7 13:14:20 2001
--- udp.cc	Tue Aug  7 13:14:45 2001
***************
*** 62,67 ****
--- 62,68 ----
  	double local_time = Scheduler::instance().clock();
  	while (n-- > 0) {
  		p = allocpkt();
+ 		hdr_cmn::access(p)->size() = size_;
  		hdr_rtp* rh = hdr_rtp::access(p);
  		rh->flags() = 0;
  		rh->seqno() = ++seqno_;