[Midnightbsd-cvs] src: tcp_output.c: Fix bug reported here:

[laffer1 at midnightbsd.org]

Log Message:
-----------
Fix bug reported here: http://blogmal.42.org/tidbits/tcp-bug.story

Only affects amd64 MidnightBSD

Modified Files:
--------------
    src/sys/netinet:
        tcp_output.c (r1.8 -> r1.9)
        (http://cvsweb.midnightbsd.org/src/sys/netinet/tcp_output.c?r1=1.8&r2=1.9)