Fix cppcheck warning in getopt.c

lib/getopt.c

@@ -721,11 +721,11 @@ 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");