Prevent misleading warning being printed to the lighttpd error log wh…

…en attempting to flush tables that don't actually exist

Signed-off-by: Adam Warner <me@adamwarner.co.uk>

scripts/pi-hole/php/teleporter.php

@@ -84,8 +84,10 @@ function archive_restore_table($file, $table, $flush=false)
 	if(is_null($contents))
 		return 0;
 
+	$flush_ignore = array("blacklist", "regex_blacklist", "whitelist", "regex_whitelist");
+
 	// Flush table if requested, only flush each table once
-	if($flush && !in_array($table, $flushed_tables))
+	if($flush && !in_array($table, $flushed_tables) && !in_array($table, $flush_ignore))
 	{
 		$db->exec("DELETE FROM \"".$table."\"");
 		array_push($flushed_tables, $table);