bgpd, zebra: Fix format for some metric outputs

Metrics are unsigned values.

  * bgpd/bgp_{debug,route,vty}.c,
  * zebra/zebra_vty.c: replace %d with %u for metrics & distances

Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
[reworded commit message]
Signed-off-by: David Lamparter <equinox@diac24.net>
diff --git a/zebra/zebra_vty.c b/zebra/zebra_vty.c
index dafcf75..8a57be9 100644
--- a/zebra/zebra_vty.c
+++ b/zebra/zebra_vty.c
@@ -541,7 +541,7 @@
 	       inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen,
 	       VTY_NEWLINE);
       vty_out (vty, "  Known via \"%s\"", zebra_route_string (rib->type));
-      vty_out (vty, ", distance %d, metric %d", rib->distance, rib->metric);
+      vty_out (vty, ", distance %u, metric %u", rib->distance, rib->metric);
       if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED))
 	vty_out (vty, ", best");
       if (rib->refcnt)
@@ -1519,7 +1519,7 @@
 	       rn->p.prefixlen,
 	       VTY_NEWLINE);
       vty_out (vty, "  Known via \"%s\"", zebra_route_string (rib->type));
-      vty_out (vty, ", distance %d, metric %d", rib->distance, rib->metric);
+      vty_out (vty, ", distance %u, metric %u", rib->distance, rib->metric);
       if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED))
 	vty_out (vty, ", best");
       if (rib->refcnt)