Fix test to work with 16-bit targets

From-SVN: r128903

gcc/testsuite/ChangeLog

+2007-10-01  Nick Clifton  <nickc@redhat.com>
+
+	* gcc.c-torture/execute/20060102-1.c (f): Fix computation to work
+	for 16-bit targets.
+
 2007-09-30  Diego Novillo  <dnovillo@google.com>
 
 	PR 33593

gcc/testsuite/gcc.c-torture/execute/20060102-1.c

@@ -2,7 +2,7 @@ extern void abort ();
 
 int f(int x)
 {
-  return (x >> 31) ? -1 : 1;
+  return (x >> (sizeof (x) * __CHAR_BIT__ - 1)) ? -1 : 1;
 }
 
 volatile int one = 1;