[Form] fixed allow render 0 and 0.0 numeric input values

Author: dczech

Resources/views/Form/form_widget_simple.html.php

@@ -1,5 +1,5 @@
 <input
     type="<?php echo isset($type) ? $view->escape($type) : 'text' ?>"
-    <?php if (!empty($value)): ?>value="<?php echo $view->escape($value) ?>"<?php endif ?>
+    <?php if (!empty($value) || is_numeric($value)): ?>value="<?php echo $view->escape($value) ?>"<?php endif ?>
     <?php echo $view['form']->block($form, 'widget_attributes') ?>
 />