Fix checkbox and list item checks in parameter lists.
Fix checkbox and list item checks in parameter lists.

* A checkbox is only true if it is actually true, not just non-nil.
* If any check fails, then fail immediately.  Before this was allowing any
  checkbox condition to be true as long as one of them was true.

eXhausted/Ovale,ultijlam/ovale,eXhausted/Ovale,ultijlam/ovale,Xeltor/ovale,ultijlam/ovale,eXhausted/Ovale