Fixed J4 compatibility issue with upload field

Author: actuallyakash

helper.php

@@ -447,7 +447,7 @@ public static function uploadFile($name, $src) {
       $filename = JFile::makeSafe($fullFileName."_".mt_rand(10000000,99999999).".".$filetype);
 
       $params = JComponentHelper::getParams('com_media');
-      $allowable = array_map('trim', explode(',', $params->get('upload_extensions')));
+      $allowable = array_map('trim', explode(',', $params->get('restrict_uploads_extensions')));
 
       if ($filetype == '' || $filetype == false || (!in_array($filetype, $allowable) ))
       {

layouts/fields/file.php

@@ -21,7 +21,7 @@
 
 // fetching allowed types
 $params = JComponentHelper::getParams('com_media');
-$allowable = array_map('trim', explode(',', $params->get('upload_extensions')));
+$allowable = array_map('trim', explode(',', $params->get('restrict_uploads_extensions')));
 $allowedMaxSize = $params->get('upload_maxsize');
 $document = JFactory::getDocument();
 $style = '.filesize-err {'