(wait_for_connection): check for fd's being too large to select on

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@9190 ec53bebd-3082-4978-b11e-865c3cabbd6b

kadmin/kadm_conn.c

@@ -172,6 +172,8 @@ wait_for_connection(krb5_context context,
     FD_ZERO(&orig_read_set);
     
     for(i = 0; i < num_socks; i++) {
+	if (socks[i] >= FD_SETSIZE)
+	    errx (1, "fd too large");
 	FD_SET(socks[i], &orig_read_set);
 	max_fd = max(max_fd, socks[i]);
     }