A sched.c patch

[Jeffrey A Law]

  In message < m0yvbkt-000266C@ocean.lucon.org >you write:
  > Could you please verify that your change also fixes
  > 
  > http://www.cygnus.com/ml/egcs-bugs/1998-Jul/0050.html
  > 
  > When I compile it with -O2 on x86, the resulting binary goes into an
  > infinite loop. Your change may also fix it.
I suspect it will fix that problem, but it would be better if you could
verify so that I can deal with some other pending stuff.

jeff