src: Add fall trough comments.

src/client.c

@@ -405,6 +405,7 @@ static void ssh_client_connection_callback(ssh_session session){
 			if (dh_handshake(session) == SSH_ERROR) {
 				goto error;
 			}
+            /* FALL THROUGH */
 		case SSH_SESSION_STATE_DH:
 			if(session->dh_handshake_state==DH_STATE_FINISHED){
 				set_status(session,1.0f);

src/packet.c

@@ -187,6 +187,7 @@ int ssh_packet_socket_callback(const void *data, size_t receivedlen, void *user)
       /* saves the status of the current operations */
       session->in_packet.len = len;
       session->packet_state = PACKET_STATE_SIZEREAD;
+      /* FALL TROUGH */
     case PACKET_STATE_SIZEREAD:
       len = session->in_packet.len;
       to_be_read = len - blocksize + sizeof(uint32_t) + current_macsize;

src/packet1.c

@@ -144,6 +144,7 @@ int ssh_packet_socket_callback1(const void *data, size_t receivedlen, void *user
 
       session->in_packet.len = len;
       session->packet_state = PACKET_STATE_SIZEREAD;
+      /* FALL THROUGH */
     case PACKET_STATE_SIZEREAD:
       len = session->in_packet.len;
       /* SSH-1 has a fixed padding lenght */