The Doctrine DBAL implementation should validate the path of the node…

… before loading it.

src/Jackalope/Transport/DoctrineDBAL/Client.php

@@ -721,6 +721,7 @@ public function getAccessibleWorkspaceNames()
      */
     public function getNode($path)
     {
+        $this->assertValidPath($path);
         $this->assertLoggedIn();
 
         $sql = "SELECT * FROM phpcr_nodes WHERE path = ? AND workspace_id = ?";