attempt to regularize atoi mess.

console-tools/setlogcons.c

@@ -22,7 +22,7 @@ extern int setlogcons_main(int argc, char **argv)
 	arg.subarg = 0; /* to specified console (current as default) */
 
 	if (argc == 2)
-		arg.subarg = atoi(argv[1]);
+		arg.subarg = xatoul_range(argv[1], 0, 63);
 
 	if (ioctl(xopen(VC_1, O_RDONLY), TIOCLINUX, &arg))
 		bb_perror_msg_and_die("TIOCLINUX");