im_mbz           1514 netinet/ip_mroute.c 			im->im_mbz = 0;
im_mbz           1747 netinet/ip_mroute.c 				im->im_mbz	= 0;
im_mbz           3069 netinet/ip_mroute.c 	im->im_mbz = 0;
im_mbz            281 netinet/ip_mroute.h 	u_int8_t  im_mbz;		/* must be zero */