tipc: eliminate uninitialized variable warning

net/tipc/link.c: In function ‘tipc_link_timeout’:
net/tipc/link.c:744:28: warning: ‘mtyp’ may be used uninitialized in this function [-Wuninitialized]

Fixes: 42b18f60 ("tipc: refactor function tipc_link_timeout()")
Acked-by: NJon Maloy <jon.maloy@ericsson.com>
Signed-off-by: NYing Xue <ying.xue@windriver.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/tipc/link.c

@@ -704,7 +704,8 @@ static void link_profile_stats(struct tipc_link *l)
  */
 int tipc_link_timeout(struct tipc_link *l, struct sk_buff_head *xmitq)
 {
-	int mtyp, rc = 0;
+	int mtyp = 0;
+	int rc = 0;
 	bool state = false;
 	bool probe = false;
 	bool setup = false;