Trivial mn10200.md fix

[law@redhat.com]

I found this while poking at the mn102 port.  This certainly doesn't get
the port functional again (there's outstanding generic as well as backend
issues), it's one less thing to worry about if we do want to bring the
port back to life.

	* mn10200.md (negsf2): Use -0x8000 instead of 0x8000 for
	bit twiddling constant.


Index: mn10200.md
===================================================================
RCS file: /cvs/cvsfiles/devo/gcc/config/mn10200/mn10200.md,v
retrieving revision 1.69
diff -c -3 -p -r1.69 mn10200.md
*** mn10200.md	2001/11/26 01:16:38	1.69
--- mn10200.md	2001/12/03 16:10:46
***************
*** 1691,1697 ****
    target = operand_subword (operands[0], 1, 1, SFmode);
    result = expand_binop (HImode, xor_optab,
  			 operand_subword_force (operands[1], 1, SFmode),
! 			 GEN_INT(0x8000), target, 0, OPTAB_WIDEN);
  
    if (result == 0)
      abort ();
--- 1691,1697 ----
    target = operand_subword (operands[0], 1, 1, SFmode);
    result = expand_binop (HImode, xor_optab,
  			 operand_subword_force (operands[1], 1, SFmode),
! 			 GEN_INT(-0x8000), target, 0, OPTAB_WIDEN);
  
    if (result == 0)
      abort ();