tolerate missed paths object

Author: taras-dubyk

forward_engineering/helpers/validationHelper.js

@@ -104,7 +104,7 @@ const createPathParameterError = (pathName, parameter) => {
 const checkPathParameters = (schema) => {
 	const requestNames = ["get", "put", "post", "delete", "options", "head", "patch", "trace", "$ref"];
 
-	return Object.keys(schema.paths).reduce((errors, pathName) => {
+	return Object.keys(schema.paths || {}).reduce((errors, pathName) => {
 		const pathParameters = getPathParameters(pathName);
 		const requests = schema.paths[pathName] || {};