Added missing 'void' to a prototype in io.h
Added missing 'void' to a prototype in io.h

mafagafogigante/walls-of-doom,walls-of-doom/walls-of-doom,walls-of-doom/walls-of-doom,mafagafogigante/walls-of-doom,walls-of-doom/walls-of-doom,mafagafogigante/walls-of-doom,walls-of-doom/walls-of-doom