libndp: fix type of field "na" in "struct ndp_msgna"
libndp: fix type of field "na" in "struct ndp_msgna"

Otherwise, compilation fails since commit cb1ab5fc8b:

   libndp.c: In function ‘ndp_msgna_flag_router’:
   libndp.c:992:18: error: ‘struct nd_neighbor_solicit’ has no member named ‘nd_na_hdr’
     return msgna->na->nd_na_flags_reserved & ND_NA_FLAG_ROUTER;

Fixes: dfed476eee ("lib: setup first pointer in all type-specific structures at once")
Signed-off-by: Thomas Haller <16e26612e4159990a6b3691e92592e691ff74132@redhat.com>
Signed-off-by: Jiri Pirko <1b548d10035ae428195c41f5d55eedb1437ccd8a@mellanox.com>

AGWA/libndp-debian,jpirko/libndp,AGWA/libndp-debian,jpirko/libndp