im_stats fix
im_stats fix

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