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/selinux/runcon.c b/selinux/runcon.c
index 015a233..37ac5d1 100644
--- a/selinux/runcon.c
+++ b/selinux/runcon.c
@@ -104,7 +104,7 @@
 	applet_long_options = runcon_longopts;
 #endif
 	opt_complementary = "-1";
-	opts = getopt32(argc, argv, "r:t:u:l:ch", &role, &type, &user, &range);
+	opts = getopt32(argv, "r:t:u:l:ch", &role, &type, &user, &range);
 	argv += optind;
 
 	if (!(opts & OPTS_CONTEXT_COMPONENT)) {