Fix -S handling within poolcommand(). Specifying a seed (-S) is only

valid when adding a pool (ippool -A), not when removing a pool
(ippool -R). It is a command line syntax error if specifying a seed (-S)
is specified when emoving a pool (-R).

contrib/ipfilter/tools/ippool.c

@@ -298,7 +298,10 @@ poolcommand(remove, argc, argv)
 			opts |= OPT_NORESOLVE;
 			break;
 		case 'S' :
-			iph.iph_seed = atoi(optarg);
+			if (remove == 0)
+				iph.iph_seed = atoi(optarg);
+			else
+				usage(argv[0]);
 			break;
 		case 'v' :
 			opts |= OPT_VERBOSE;