Access control (Permission) is not checked for the nodes themself.

I created a site where only the authenticated users could see the content of the nodes.
Using the nodeblock module I saw that anonymous users could still see the content of the block and node.

So this means that this module does not verify that the current user have permission to see the content of the node.

Steps to reproduce:

1. create a new content type and configure it to be a nodeblock type.
2. Create a new node from that content type
3. Assign your node to a region (using the admin/build/block page)
4. change the permissions so that only authenticated users can access content.
5. Logout
6. Expected Behavior: Not able to see the node you created