Fix cppcheck warning in getopt.c

lib/getopt.c

@@ -720,12 +720,12 @@ int
 main(argc, argv)
 int argc;
 char **argv;
+{
+    while (1)
     {
         int c;
         int digit_optind = 0;
 
-    while (1)
-    {
         int this_option_optind = optind ? optind : 1;
 
         c = getopt(argc, argv, "abc:d:0123456789");