hs20-osu-client: Fix pol_upd command line parsing

This command was documented as having the Server URL parameter as
optional, but the implementation did not match that. Allow this
parameter to be left out.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

hs20/client/osu_client.c

@@ -2570,7 +2570,7 @@ static int cmd_pol_upd(struct hs20_osu_client *ctx, const char *address,
 	if (!pps_fname) {
 		char buf[256];
 		wpa_printf(MSG_INFO, "Determining PPS file based on Home SP information");
-		if (os_strncmp(address, "fqdn=", 5) == 0) {
+		if (address && os_strncmp(address, "fqdn=", 5) == 0) {
 			wpa_printf(MSG_INFO, "Use requested FQDN from command line");
 			os_snprintf(buf, sizeof(buf), "%s", address + 5);
 			address = NULL;
@@ -3137,11 +3137,8 @@ int main(int argc, char *argv[])
 				  argc > optind + 2 ? argv[optind + 2] : NULL,
 				  argc > optind + 3 ? argv[optind + 3] : NULL);
 	} else if (strcmp(argv[optind], "pol_upd") == 0) {
-		if (argc - optind < 2) {
-			usage();
-			exit(0);
-		}
-		ret = cmd_pol_upd(&ctx, argc > 2 ? argv[optind + 1] : NULL,
+		ret = cmd_pol_upd(&ctx,
+				  argc > optind + 1 ? argv[optind + 1] : NULL,
 				  argc > optind + 2 ? argv[optind + 2] : NULL,
 				  argc > optind + 3 ? argv[optind + 3] : NULL);
 	} else if (strcmp(argv[optind], "prov") == 0) {