[TIPC]: First phase of assert() cleanup

This also contains enhancements to simplify comparisons in name table
publication removal algorithm and to simplify name table sanity checking
when shutting down TIPC.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/tipc/port.c

@@ -168,7 +168,6 @@ void tipc_port_recv_mcast(struct sk_buff *buf, struct port_list *dp)
 	struct port_list *item = dp;
 	int cnt = 0;
 
-	assert(buf);
 	msg = buf_msg(buf);
 
 	/* Create destination port list, if one wasn't supplied */