bug in tcp.cc?

[Jitendra Padhye <jitu@cs.umass.edu>]

Hi,

In tcp.cc: (ns version 2.1b2)

=====
    if (overhead_ == 0 || force) {
      output(t_seqno_++, reason);
      npackets++;
=====

However, "overhead_" is of type "double", so the equality test
may fail even if overhead is set to 0 ...

- Jitu