[TIPC]: Fix two minor sparse warnings.

fix two warnings generated by sparse:

link.c:2386 symbol 'msgcount' shadows an earlier one
node.c:244 symbol 'addr_string' shadows an earlier one

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/tipc/node.c

@@ -241,8 +241,6 @@ struct node *tipc_node_attach_link(struct link *l_ptr)
 		char addr_string[16];
 
 		if (n_ptr->link_cnt >= 2) {
-			char addr_string[16];
-
 			err("Attempt to create third link to %s\n",
 			    addr_string_fill(addr_string, n_ptr->addr));
 			return NULL;