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

diff --git a/util-linux/hwclock.c b/util-linux/hwclock.c
index fcb7308..09b09eb 100644
--- a/util-linux/hwclock.c
+++ b/util-linux/hwclock.c
@@ -189,7 +189,7 @@
 	applet_long_options = hwclock_longopts;
 #endif
 	opt_complementary = "r--ws:w--rs:s--wr:l--u:u--l";
-	opt = getopt32(argc, argv, "lurswf:", &rtcname);
+	opt = getopt32(argv, "lurswf:", &rtcname);
 
 	/* If -u or -l wasn't given check if we are using utc */
 	if (opt & (HWCLOCK_OPT_UTC | HWCLOCK_OPT_LOCALTIME))