oops: Fix issue with dynamic field lookups

include/class.dynamic_forms.php

@@ -56,7 +56,7 @@ class DynamicForm extends VerySimpleModel {
     }
 
     function getDynamicFields() {
-        if (!isset($this->_dfields) && isset($this->id)) {
+        if (!$this->_dfields && isset($this->id)) {
             $this->_dfields = DynamicFormField::objects()
                 ->filter(array('form_id'=>$this->id))
                 ->all();