tipc: Optimize message initialization routine

This patch eliminates the rarely-used "error code" argument
when initializing a TIPC message header, since the default
value of zero is the desired result in most cases; the few
exceptional cases now set the error code explicitly.

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

diff --cc net/tipc/bcast.c
Simple merge

diff --cc net/tipc/cluster.c
Simple merge

diff --cc net/tipc/discover.c
Simple merge

diff --cc net/tipc/link.c
Simple merge

diff --cc net/tipc/msg.h
Simple merge

diff --cc net/tipc/name_distr.c
Simple merge

diff --cc net/tipc/port.c
Simple merge