bgpd: Fix display of unsigned attributes

* bgp_route.c: (route_vty_out*) The local prefix, metric and weight values
  are all stored as uint32_t.  Change the format to %u so that large values
  are not displayed as negative integers.
diff --git a/bgpd/bgp_route.c b/bgpd/bgp_route.c
index fd51ad1..39de495 100644
--- a/bgpd/bgp_route.c
+++ b/bgpd/bgp_route.c
@@ -5729,12 +5729,12 @@
 #endif /* HAVE_IPV6 */
 
       if (attr->flag & ATTR_FLAG_BIT (BGP_ATTR_MULTI_EXIT_DISC))
-	vty_out (vty, "%10d", attr->med);
+	vty_out (vty, "%10u", attr->med);
       else
 	vty_out (vty, "          ");
 
       if (attr->flag & ATTR_FLAG_BIT (BGP_ATTR_LOCAL_PREF))
-	vty_out (vty, "%7d", attr->local_pref);
+	vty_out (vty, "%7u", attr->local_pref);
       else
 	vty_out (vty, "       ");
 
@@ -5794,16 +5794,16 @@
 #endif /* HAVE_IPV6 */
 
       if (attr->flag & ATTR_FLAG_BIT (BGP_ATTR_MULTI_EXIT_DISC))
-	vty_out (vty, "%10d", attr->med);
+	vty_out (vty, "%10u", attr->med);
       else
 	vty_out (vty, "          ");
 
       if (attr->flag & ATTR_FLAG_BIT (BGP_ATTR_LOCAL_PREF))
-	vty_out (vty, "%7d", attr->local_pref);
+	vty_out (vty, "%7u", attr->local_pref);
       else
 	vty_out (vty, "       ");
       
-      vty_out (vty, "%7d ", (attr->extra ? attr->extra->weight : 0));
+      vty_out (vty, "%7u ", (attr->extra ? attr->extra->weight : 0));
       
       /* Print aspath */
       if (attr->aspath)
@@ -6073,15 +6073,15 @@
       vty_out (vty, "      Origin %s", bgp_origin_long_str[attr->origin]);
 	  
       if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))
-	vty_out (vty, ", metric %d", attr->med);
+	vty_out (vty, ", metric %u", attr->med);
 	  
       if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))
-	vty_out (vty, ", localpref %d", attr->local_pref);
+	vty_out (vty, ", localpref %u", attr->local_pref);
       else
-	vty_out (vty, ", localpref %d", bgp->default_local_pref);
+	vty_out (vty, ", localpref %u", bgp->default_local_pref);
 
       if (attr->extra && attr->extra->weight != 0)
-	vty_out (vty, ", weight %d", attr->extra->weight);
+	vty_out (vty, ", weight %u", attr->extra->weight);
 	
       if (! CHECK_FLAG (binfo->flags, BGP_INFO_HISTORY))
 	vty_out (vty, ", valid");