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/networking/ping.c b/networking/ping.c
index d1a413d..5d61cd7 100644
--- a/networking/ping.c
+++ b/networking/ping.c
@@ -689,7 +689,7 @@
 
 	/* exactly one argument needed, -v and -q don't mix */
 	opt_complementary = "=1:q--v:v--q";
-	getopt32(argc, argv, OPT_STRING, &opt_c, &opt_s, &opt_I);
+	getopt32(argv, OPT_STRING, &opt_c, &opt_s, &opt_I);
 	if (option_mask32 & OPT_c) pingcount = xatoul(opt_c); // -c
 	if (option_mask32 & OPT_s) datalen = xatou16(opt_s); // -s
 	if (option_mask32 & OPT_I) { // -I