Check if the presets exist when going to get them

- Return empty object if no preset file is found

Client/utilities/updatePresets.js

@@ -17,7 +17,7 @@ function writePresets(presets, callback = undefined) {
         // Error checking
         if (err) throw err;
         log.DEBUG("Write Complete");
-        if (callback) callback()
+        if (callback) callback(); else return
     });
 }
 
@@ -72,7 +72,8 @@ function convertFrequencyToHertz(frequency){
 exports.getPresets = function getPresets() {
     const presetDir = path.resolve("./config/radioPresets.json");
     log.DEBUG(`Getting presets from directory: '${presetDir}'`);    
-    return JSON.parse(fs.readFileSync(presetDir));
+    if (fs.existsSync(presetDir)) return JSON.parse(fs.readFileSync(presetDir));
+    else return {};
 }
 
 /**