don't pass argc in getopt32, it's superfluous

(add/remove: 0/0 grow/shrink: 12/131 up/down: 91/-727) Total: -636 bytes
   text    data     bss     dec     hex filename
 773469    1058   11092  785619   bfcd3 busybox_old
 772644    1058   11092  784794   bf99a busybox_unstripped

util-linux/switch_root.c

@@ -74,7 +74,7 @@ int switch_root_main(int argc, char **argv)
 	// Parse args (-c console)
 
 	opt_complementary = "-2";
-	getopt32(argc, argv, "c:", &console);
+	getopt32(argv, "c:", &console);
 	argv += optind;
 
 	// Change to new root directory and verify it's a different fs.