(main): Protect invocation of setlocale by ifdef.

src/tar.c

@@ -1622,7 +1622,9 @@ main (int argc, char **argv)
   set_start_time ();
   program_name = argv[0];
 
+#ifdef HAVE_SETLOCALE
   setlocale (LC_ALL, "");
+#endif
   bindtextdomain (PACKAGE, LOCALEDIR);
   textdomain (PACKAGE);