Fix an obvious bug in GCC-4.3.2's ARM code generator.

PR target/37668
 * arm.c (arm_size_rtx_costs, case NEG): Don't fall through if the
   result will be in an FPU register.

This has been applied in gcc-4.4.0

   Martin Guy <martinwguy@yahoo.it>

*** gcc-4.3.2/gcc/config/arm/arm.c	(revision 142660)
--- gcc-4.3.2/gcc/config/arm/arm.c	(local)
*************** arm_size_rtx_costs (rtx x, int code, int
*** 5201,5207 ****
  
      case NEG:
        if (TARGET_HARD_FLOAT && GET_MODE_CLASS (mode) == MODE_FLOAT)
! 	*total = COSTS_N_INSNS (1);
        /* Fall through */
      case NOT:
        *total = COSTS_N_INSNS (ARM_NUM_REGS (mode));
--- 5201,5211 ----
  
      case NEG:
        if (TARGET_HARD_FLOAT && GET_MODE_CLASS (mode) == MODE_FLOAT)
! 	{
! 	  *total = COSTS_N_INSNS (1);
! 	  return false;
! 	}
! 
        /* Fall through */
      case NOT:
        *total = COSTS_N_INSNS (ARM_NUM_REGS (mode));