fix return status code check

Author: L3P3

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "rtjscomp",
-	"version": "0.9.13",
+	"version": "0.9.14",
 	"description": "php-like server but with javascript",
 	"repository": {
 		"type": "git",

rtjscomp.js

@@ -1474,9 +1474,9 @@ const request_handle = async (request, response, https) => {
 				}
 				if (
 					typeof returned !== 'number' ||
-					err < 100 ||
-					err > 599 ||
-					err % 1 > 0
+					returned < 100 ||
+					returned > 599 ||
+					returned % 1 > 0
 				) {
 					log(`[error] ${path}: invalid status code: ${returned}`);
 					throw 500;