scanner: Fix desc_dump() to not extend beyond column 72
scanner: Fix desc_dump() to not extend beyond column 72

sir-murray/wayland,eyolfson/wayland,sir-murray/wayland,eyolfson/wayland,sir-murray/wayland,bitfactor/wayland,bitfactor/wayland,eyolfson/wayland,tulcod/wayland,tulcod/wayland,tulcod/wayland,mchalupa/wayland,mchalupa/wayland,abooij/wayland,bitfactor/wayland,abooij/wayland,abooij/wayland,mchalupa/wayland