sctp conntrack should return 0 for invalid packets, otherwise we end
up with invalid conntrack entries.


ChangeSet@1.1935.1.11, 2004-09-20 11:54:00+02:00, kaber@coreworks.de
  [NETFILTER]: Fix invalid return values in sctp_new
 
  Signed-off-by: Patrick McHardy <kaber@trash.net>