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/miscutils/chrt.c b/miscutils/chrt.c
index d549708..98399ce 100644
--- a/miscutils/chrt.c
+++ b/miscutils/chrt.c
@@ -52,7 +52,7 @@
 	int prio = 0, policy = SCHED_RR;
 
 	opt_complementary = "r--fo:f--ro:r--fo"; /* only one policy accepted */
-	opt = getopt32(argc, argv, "+mp:rfo", &p_opt);
+	opt = getopt32(argv, "+mp:rfo", &p_opt);
 	if (opt & OPT_r)
 		policy = SCHED_RR;
 	if (opt & OPT_f)