Fix callback validation

Signed-off-by: Adam Hoka <hoka.adam@nexogen.hu>

lib/web/imageRouter/minio.js

@@ -4,6 +4,7 @@ const path = require('path')
 
 const config = require('../../config')
 const {getImageMimeType} = require('../../utils')
+const logger = require('../../logger')
 
 const Minio = require('minio')
 const minioClient = new Minio.Client({
@@ -21,7 +22,7 @@ exports.uploadImage = function (imagePath, callback) {
   }
 
   if (!callback || typeof callback !== 'function') {
-    callback(new Error('Callback has to be a function'), null)
+    logger.error('Callback has to be a function')
     return
   }