missed to initialise the sentinel node

Signed-off-by: Mattias Andrée <maandree@operamail.com>
m

Signed-off-by: Mattias Andrée <maandree@operamail.com>
m

Signed-off-by: Mattias Andrée <maandree@operamail.com>
whoops + add array sentinel linked lists

Signed-off-by: Mattias Andrée <maandree@operamail.com>