Don't MQTT-publish the download of temp files

src/sbbs3/ftpsrvr.c

@@ -827,6 +827,7 @@ static void send_thread(void* arg)
 			if(!xfer.tmpfile && !xfer.delfile && !(scfg.dir[f.dir]->misc&DIR_NOSTAT))
 				inc_download_stats(&scfg, 1, (ulong)total);
 
+			if(!xfer.tmpfile)
 				mqtt_file_download(&mqtt, xfer.user, &f, total, xfer.client);
 		}