Cleanup return logic in marpa_r_start_input()
Cleanup return logic in marpa_r_start_input()

jeffreykegler/libmarpa,pczarn/kollos,jeffreykegler/libmarpa,jeffreykegler/kollos,jeffreykegler/kollos,jeffreykegler/kollos,pczarn/kollos,jeffreykegler/libmarpa,jeffreykegler/libmarpa,jeffreykegler/kollos,jeffreykegler/libmarpa,pczarn/kollos,jeffreykegler/kollos,pczarn/kollos,pczarn/kollos