One more off_t bug in libio

[Jeffrey A Law]

  In message < Pine.LNX.3.96.980209195359.32511A-100000@bartlet.df.lth.se >you write
  > NetBSD-sparc has sizeof(off_t) > sizeof(int), so we must include
  > unistd.h to get the intended behaivour when using lseek(2).
  > 
  >    /Krister
  > 
  > 
  > (The following patch is made relative to the 980205 snapshot.)
  > 
  > 
  > Sun Feb  8 20:58:42 1998  Krister Walfridsson (cato@df.lth.se)
  > 
  >         * fileops.c: #include <unistd.h>.
  >         * ioprims.c: Likewise.
Thanks.  Installed.

jeff