GenericTransmit incorrect param types

`header`, `one`, `zero` are all of type `int` when really they are a `List[int]`. Small issue, but this was a gotchya for me when I went to update the trail ("ending code") param.

Start by locating the GenericTransmit definition and inspect the annotations for header, one, zero, and the trail or ending-code parameter mentioned in the issue. Update the incorrect parameter types to match the requested List[int] behavior, then verify the surrounding IR transmit code and any available checks accept list values.

Written by the indexing model from the issue text.