Fix 1st argument of bstp_notify_rtage

[Ryota Ozaki]

Hello,

When I read bridgestp.c, I found a bug that a wrong
pointer is passed to bstp_notify_rtage via void *;
bp->bp_ifp is passed but treated as bp.

Please check the below patch and apply it if it's
appropriate.

Regards,
  ozaki-r

diff --git a/sys/net/bridgestp.c b/sys/net/bridgestp.c
index 150cc05..182784e 100644
--- a/sys/net/bridgestp.c
+++ b/sys/net/bridgestp.c
@@ -254,7 +254,7 @@ void        bstp_set_timer_tc(struct bstp_port *);
 void   bstp_set_timer_msgage(struct bstp_port *);
 int    bstp_rerooted(struct bstp_state *, struct bstp_port *);
 u_int32_t      bstp_calc_path_cost(struct bstp_port *);
-void   bstp_notify_rtage(void *, int);
+void   bstp_notify_rtage(struct bstp_port *, int);
 void   bstp_ifupdstatus(struct bstp_state *, struct bstp_port *);
 void   bstp_enable_port(struct bstp_state *, struct bstp_port *);
 void   bstp_disable_port(struct bstp_state *, struct bstp_port *);
@@ -1447,7 +1447,7 @@ bstp_set_port_tc(struct bstp_port *bp, int state)
                bstp_timer_stop(&bp->bp_tc_timer);
                /* flush routes on the parent bridge */
                bp->bp_fdbflush = 1;
-               bstp_notify_rtage(bp->bp_ifp, 0);
+               bstp_notify_rtage(bp, 0);
                bp->bp_tc_ack = 0;
                DPRINTF("%s -> TC_INACTIVE\n", bp->bp_ifp->if_xname);
                break;
@@ -1489,7 +1489,7 @@ bstp_set_port_tc(struct bstp_port *bp, int state)
        case BSTP_TCSTATE_PROPAG:
                /* flush routes on the parent bridge */
                bp->bp_fdbflush = 1;
-               bstp_notify_rtage(bp->bp_ifp, 0);
+               bstp_notify_rtage(bp, 0);
                bp->bp_tc_prop = 0;
                bstp_set_timer_tc(bp);
                DPRINTF("%s -> TC_PROPAG\n", bp->bp_ifp->if_xname);
@@ -1585,9 +1585,8 @@ bstp_calc_path_cost(struct bstp_port *bp)
 }

 void
-bstp_notify_rtage(void *arg, int pending)
+bstp_notify_rtage(struct bstp_port *bp, int pending)
 {
-       struct bstp_port *bp = (struct bstp_port *)arg;
        int age = 0;

        splassert(IPL_NET);