Calling node_save After Loading A Multichoice Question with node_load Causes the Question to Lose Its Answers and Feedback

If you run the following code with the nid of a multichoice question, the question will lose its answer and feedback text:

$node = node_load($nid);

node_save($node);

This is extremely confusing if you are trying to create any sort of module that needs to directly manage these nodes.

I have attached a patch that fixes this issue. All the patch does is loads the alternative values for the node in the same format as the node add form submits them. This is how every other question type already works.