[TIPC]: Avoid compiler warning

static void tipc_cltr_multicast(struct cluster *c_ptr, struct sk_buff *buf,

				u32 lower, u32 upper);

struct sk_buff *tipc_cltr_prepare_routing_msg(u32 data_size, u32 dest);

static struct sk_buff *tipc_cltr_prepare_routing_msg(u32 data_size, u32 dest);

struct node **tipc_local_nodes = NULL;

struct node_map tipc_cltr_bcast_nodes = {0,{0,}};