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

coreutils/mv.c

@@ -48,7 +48,7 @@ int mv_main(int argc, char **argv)
 	applet_long_options = mv_longopts;
 #endif
 	opt_complementary = "f-i:i-f";
-	flags = getopt32(argc, argv, "fi");
+	flags = getopt32(argv, "fi");
 	if (optind + 2 > argc) {
 		bb_show_usage();
 	}