Add missing DEFGENERIC.
Add missing DEFGENERIC.

vsedach/iolib-simple-mux,dkochmanski/iolib,deadtrickster/iolib,shamazmazum/iolib,attila-lendvai/iolib,sionescu/iolib,tiago4orion/iolib,dkochmanski/iolib,attila-lendvai/iolib,lispnik/iolib,deadtrickster/iolib,shamazmazum/iolib,tiago4orion/iolib,sionescu/iolib,tiago4orion/iolib,deadtrickster/iolib,shamazmazum/iolib,sionescu/iolib,attila-lendvai/iolib,dkochmanski/iolib,lispnik/iolib,lispnik/iolib,vsedach/iolib-simple-mux