- make the first arg of the filter function passed to rtnl_dump_filter constant
  to match normal iproute. No obj-code changes.
diff --git a/networking/libiproute/libnetlink.c b/networking/libiproute/libnetlink.c
index 47a055a..4511d36 100644
--- a/networking/libiproute/libnetlink.c
+++ b/networking/libiproute/libnetlink.c
@@ -103,7 +103,7 @@
 }
 
 static int rtnl_dump_filter(struct rtnl_handle *rth,
-		int (*filter)(struct sockaddr_nl *, struct nlmsghdr *n, void *),
+		int (*filter)(const struct sockaddr_nl *, struct nlmsghdr *n, void *),
 		void *arg1/*,
 		int (*junk)(struct sockaddr_nl *, struct nlmsghdr *n, void *),
 		void *arg2*/)
@@ -195,7 +195,7 @@
 }
 
 int xrtnl_dump_filter(struct rtnl_handle *rth,
-		int (*filter)(struct sockaddr_nl *, struct nlmsghdr *n, void *),
+		int (*filter)(const struct sockaddr_nl *, struct nlmsghdr *, void *),
 		void *arg1)
 {
 	int ret = rtnl_dump_filter(rth, filter, arg1/*, NULL, NULL*/);
@@ -207,7 +207,7 @@
 int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n,
 	      pid_t peer, unsigned groups,
 	      struct nlmsghdr *answer,
-	      int (*junk)(struct sockaddr_nl *, struct nlmsghdr *n, void *),
+	      int (*junk)(struct sockaddr_nl *, struct nlmsghdr *, void *),
 	      void *jarg)
 {
 /* bbox doesn't use parameters no. 3, 4, 6, 7, they are stubbed out */