Make sure kexfirstinitialise is called early enough

cli-session.c

@@ -124,6 +124,8 @@ void cli_session(int sock_in, int sock_out, struct dropbear_progress_connection
 	/* Exchange identification */
 	send_session_identification();
 
+	kexfirstinitialise(); /* initialise the kex state */
+
 	send_msg_kexinit();
 
 	session_loop(cli_sessionloop);

common-session.c

@@ -90,8 +90,6 @@ void common_session_init(int sock_in, int sock_out) {
 	ses.maxfd = MAX(ses.maxfd, ses.signal_pipe[0]);
 	ses.maxfd = MAX(ses.maxfd, ses.signal_pipe[1]);
 	
-	kexfirstinitialise(); /* initialise the kex state */
-
 	ses.writepayload = buf_new(TRANS_MAX_PAYLOAD_LEN);
 	ses.transseq = 0;
 

svr-session.c

@@ -138,6 +138,8 @@ void svr_session(int sock, int childpipe) {
 
 	/* exchange identification, version etc */
 	send_session_identification();
+	
+	kexfirstinitialise(); /* initialise the kex state */
 
 	/* start off with key exchange */
 	send_msg_kexinit();