Merge pull request #1472 from Duet3D/hotfix-filechecks

Updating Read File function

Author: yasasw

nodescriptsTS/src/util.ts

@@ -141,7 +141,7 @@ const readFile = {
         return new Promise((resolve, reject) => {
             fs.readFile(path, (err, data) => {
                 if (err) reject(err);
-                resolve(JSON.parse((data).toString()));
+                resolve(JSON.parse((data||"").toString()));
             });
         });    
     },