Dropbear idle timeout not working with keepalives enabled

When SSHKeepAlive is enabled, dropbear idletimeout is not working as expected.

Potential fix would be

@process_packet.c :80
	/* Ignore these packet types so that keepalives don't interfere with
	idle detection. This is slightly incorrect since a tcp forwarded
	global request with failure won't trigger the idle timeout,
	but that's probably acceptable */
	if (!(type == SSH_MSG_GLOBAL_REQUEST || type == SSH_MSG_REQUEST_FAILURE
/*Add below condition to include channel failure case*/
		|| type == SSH_MSG_CHANNEL_FAILURE))
 {
		ses.last_packet_time_idle = now;
}

Keep alive replies are coming with the above mentioned type.

Suggestions are welcome.