[PATCH 1/2] clean up and optimize get_output_module

[Chris Brannon]

Trevor Saunders wrote:
> - reorganize the function to return if we have a module, to remove
> nesting.
> - walk the linked list of output modules with next pointers instead of
>   indexing into the list.

Hello Trevor,
I sent a full critique of these privately.
Please rework both.

-- Chris