SUNRPC: Clean up in rpc_show_tasks

/home/cel/linux/net/sunrpc/clnt.c: In function ‘rpc_show_tasks’:
/home/cel/linux/net/sunrpc/clnt.c:1538: warning:
	signed and unsigned type in conditional expression

This points out another case where a conditional expression returns a
signed value in one arm and an unsigned value in the other.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

net/sunrpc/clnt.c

@@ -1526,13 +1526,18 @@ void rpc_show_tasks(void)
 		spin_lock(&clnt->cl_lock);
 		list_for_each_entry(t, &clnt->cl_tasks, tk_task) {
 			const char *rpc_waitq = "none";
+			int proc;
+
+			if (t->tk_msg.rpc_proc)
+				proc = t->tk_msg.rpc_proc->p_proc;
+			else
+				proc = -1;
 
 			if (RPC_IS_QUEUED(t))
 				rpc_waitq = rpc_qname(t->u.tk_wait.rpc_waitq);
 
 			printk("%5u %04d %04x %6d %8p %6d %8p %8ld %8s %8p %8p\n",
-				t->tk_pid,
-				(t->tk_msg.rpc_proc ? t->tk_msg.rpc_proc->p_proc : -1),
+				t->tk_pid, proc,
 				t->tk_flags, t->tk_status,
 				t->tk_client,
 				(t->tk_client ? t->tk_client->cl_prog : 0),