Target passing between NPCs only happens when theyr are friendly (not neutral)...

Target passing between NPCs only happens when theyr are friendly (not neutral) toward one another. This should fix the "veneration" of alchemists in towns


git-svn-id: http://svn.net-core.org/repos/t-engine4@3009 51575b47-30f0-44d4-a5cc-537603b46e54

game/modules/tome/class/NPC.lua

@@ -69,7 +69,7 @@ function _M:seen_by(who)
 	if self.ai_target.actor then return end
 	if not who.ai_target then return end
 	if not who.ai_target.actor then return end
-	if self:reactionToward(who) < 0 then return end
+	if self:reactionToward(who) <= 0 then return end
 	if not who:canSee(who.ai_target.actor) then return end
 	self:setTarget(who.ai_target.actor)
 end