Do not link to unpublished posts

Currently flippy links to posts that are unpublished, which should not be the default behavior. I've modified flippy.module to fix this:

...
if (!isset($master_list[$node->nid])) {
// Create a starting-point query object
$query = db_select('node')
->fields('node', array('nid'))
->condition('nid', $node->nid, '!=')
->condition('type', $node->type, '=')
->condition('status', 0,'>')
->range(0, 1);
...

I added the second to last line: "->condition('status', 0,'>')"