[FIX] Use existing getDonatePercent

public/include/classes/user.class.php

@@ -56,7 +56,7 @@ class User {
     return $this->getSingle($id, 'no_fees', 'id');
   }
   public function getUserDonatePercent($id) {
-    return $this->getSingle($id, 'donate_percent', 'id');
+    return $this->getDonatePercent($id);
   }
   public function getUserAdmin($id) {
     return $this->getSingle($id, 'is_admin', 'id');