check for flash helper before call it, and put the statement back bef…

…ore the content.

src/Template/Layout/default.ctp

@@ -36,7 +36,6 @@ $this->prepend('tb_body_attrs', ' class="' . implode(' ', array($this->request->
 if (!$this->fetch('tb_body_start')) {
     $this->start('tb_body_start');
     echo '<body' . $this->fetch('tb_body_attrs') . '>';
-    echo $this->Flash->render();
     $this->end();
 }
 if (!$this->fetch('tb_body_end')) {
@@ -86,6 +85,9 @@ $this->prepend('script', $this->Html->script(['jquery/jquery', 'bootstrap/bootst
 
     <?php
     echo $this->fetch('tb_body_start');
+    if (isset($this->Flash)) {
+        echo $this->Flash->render();
+    }
     echo $this->fetch('content');
     echo $this->fetch('tb_footer');
     echo $this->fetch('script');