Adam D Ligas's segfault: one form of connection closure was failing

to set SSH_STATE_CLOSED, causing subsequent resize events to go foom.

[originally from svn r844]

ssh.c

@@ -1121,6 +1121,7 @@ static void ssh_gotdata(unsigned char *data, int datalen)
 static int ssh_receive(Socket skt, int urgent, char *data, int len) {
     if (!len) {
 	/* Connection has closed. */
+	ssh_state = SSH_STATE_CLOSED;
 	sk_close(s);
 	s = NULL;
 	return 0;