write the sizeof(arr)/sizeof(arr[0]) on the common form.

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@20394 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/des/test_rand.c

@@ -79,7 +79,7 @@ static void
 usage (int ret)
 {
     arg_printusage (args,
-		    sizeof(args)/sizeof(*args),
+		    sizeof(args)/sizeof(args[0]),
 		    NULL,
 		    "out-random-file");
     exit (ret);