more legible/a bit faster
more legible/a bit faster

jcupitt/libvips,mcanthony/libvips,lovell/libvips,jcupitt/libvips,mcanthony/libvips,jcupitt/libvips,lovell/libvips,leiyangyou/libvips,jcupitt/libvips,lovell/libvips,wishabi/libvips,mcanthony/libvips,leiyangyou/libvips,lovell/libvips,leiyangyou/libvips,mcanthony/libvips,wishabi/libvips,leiyangyou/libvips,wishabi/libvips,wishabi/libvips