Correctly set channels in NSF codec
Correctly set channels in NSF codec

shazow/mog,mjibson/mog,mjibson/mog,shazow/mog,mjibson/moggio,mjibson/moggio,mjibson/mog,shazow/mog,mjibson/moggio,mjibson/mog,shazow/mog,mjibson/moggio