"Illegal offset type" error when displaying node in layout

Hello :)

When I use composity layout to display nodes inside my layout, I get the following errors :

* warning: Illegal offset type in isset or empty in /server/homes/anselm/source/websites/iansa/sites/all/modules/composite/composite.module on line 717.
* warning: Illegal offset type in /server/homes/anselm/source/websites/iansa/sites/all/modules/composite/composite.module on line 718.

I have identified the problem : in composite.node.inc, _composite_nodes_recursion_check is called with a node as parameter - it should have been given a nid.

Attached is the patch to fix this issue.