get rid of direct references to Database's engine

ext/log_db/main.php

@@ -58,7 +58,7 @@ class LogDatabase extends Extension {
 					$args["module"] = $_GET["module"];
 				}
 				if(!empty($_GET["user"])) {
-					if($database->engine->name == "pgsql") {
+					if($database->get_driver_name() == "pgsql") {
 						if(preg_match("#\d+\.\d+\.\d+\.\d+(/\d+)?#", $_GET["user"])) {
 							$wheres[] = "(username = :user1 OR text(address) = :user2)";
 							$args["user1"] = $_GET["user"];