Incorrect links in fused views

As the title suggests this bug is caused by the views fusion module, but since I don't see a way to fix it without modifying code in views_node.inc, I decided to assign it to the Views-project.

Let's start with an explanation of the problem. Suppose you've created two views, one shows a list of nodes of type A and the other a list of nodes of type B. Both lists have only one column, the node title, which is displayed as a link to that node. When you would fuse these views using views_fusion the result is a combined list of nodes of both type A and B, every row showing two titles of related nodes. We would expect each title to link to the corresponding node, but unfortunately both titles will now link to the node of type A.

Since we have chosen the option "as link", the handler "views_handler_field_nodelink" (or "views_handler_field_nodelink_with_mark") is called. This function constructs the link, but will always use the property nid of the data object that is passed to it for the node ID. This is incorrect, because in a fused view the 'tablename' in the $fielddata-array is not 'node', but 'vXXnode'. In this case the property 'vXXnode_nid' of the data object should be used to retrieve the node ID.

I have no idea how this bug can be solved without modifying views_node.inc, but maybe fago has a suggestion on this?

Anyway, the attached patch fixes the problem. I don't know of any side-effects.

Cheers,
Remco