NPCs can only pass target if the target and the npc given them are within at most sight range

When an NPC can has been fooled by teleporting away, it stays fooled instead of magicalyl finding the way


git-svn-id: http://svn.net-core.org/repos/t-engine4@6196 51575b47-30f0-44d4-a5cc-537603b46e54