Avoid avoidable ambush immediately after new target is attained when autoexploring

Explore more efficiently by inferring likely wall tiles when autoexploring
If autoexplore is stopped on the way to an exit (such as by a trap), then it will still go that target when AE is initiated again
When autoexploring don't go to items that the player dropped


git-svn-id: http://svn.net-core.org/repos/t-engine4@4720 51575b47-30f0-44d4-a5cc-537603b46e54

game/modules/tome/class/Actor.lua

@@ -3241,6 +3241,8 @@ end
 --- Called upon dropping an object
 function _M:onDropObject(o)
 	if self:attr("has_transmo") then o.__transmo = false end
+	if self.player then game.level.map.attrs(self.x, self.y, "obj_seen", true)
+	elseif game.level.map.attrs(self.x, self.y, "obj_seen") then game.level.map.attrs(self.x, self.y, "obj_seen", false) end
 end
 
 function _M:transmoPricemod(o) if o.type == "gem" then return 0.40 else return 0.05 end end

game/modules/tome/class/Player.lua

@@ -724,6 +724,10 @@ function _M:runStopped()
 			node.actor:addParticles(engine.Particles.new("notice_enemy", 1))
 		end
 	end
+
+	-- if you stop at an object (such as on a trap), then mark it as seen
+	local obj = game.level.map:getObject(x, y, 1)
+	if obj then game.level.map.attrs(x, y, "obj_seen", true) end
 end
 
 --- Activates a hotkey with a type "inventory"