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>

Index: gcc-4.2.4/gcc/config/arm/arm.c
===================================================================
--- gcc-4.2.4.orig/gcc/config/arm/arm.c	2009-08-09 15:43:47.000000000 +0100
+++ gcc-4.2.4/gcc/config/arm/arm.c	2009-08-09 15:44:55.000000000 +0100
@@ -4771,7 +4771,11 @@
 
     case NEG:
       if (TARGET_HARD_FLOAT && GET_MODE_CLASS (mode) == MODE_FLOAT)
-	*total = COSTS_N_INSNS (1);
+	{
+	  *total = COSTS_N_INSNS (1);
+	  return false;
+	}
+
       /* Fall through */
     case NOT:
       *total = COSTS_N_INSNS (ARM_NUM_REGS (mode));