Fixed the "black map" bug

git-svn-id: http://svn.net-core.org/repos/t-engine4@3449 51575b47-30f0-44d4-a5cc-537603b46e54

game/engines/default/engine/Map.lua

@@ -326,13 +326,23 @@ function _M:close()
 					se._mo = nil
 				end
 			end end
-			self.map[i][pos] = nil
 		end
 	end
 	self.closed = true
 	self.changed = true
 end
 
+--- Closes things in the object to allow it to be garbage collected
+-- Map objects are NOT automatically garbage collected because they contain FOV C structure, which themselves have a reference
+-- to the map. Cyclic references! BAD BAD BAD !<br/>
+-- The closing should be handled automatically by the Zone class so no bother for authors
+function _M:reopen()
+	if not self.closed then return end
+	self:redisplay()
+	self.closed = nil
+	self.changed = true
+end
+
 --- Cleans the FOV infos (seens table)
 function _M:cleanFOV()
 	if not self.clean_fov then return end

game/engines/default/engine/Zone.lua

@@ -651,6 +651,9 @@ function _M:getLevel(game, lev, old_lev, no_close)
 	-- Clean up things
 	collectgarbage("collect")
 
+	-- Re-open the level if needed (the method does the check itself)
+	level.map:reopen()
+
 	return level
 end
 

game/modules/tome/data/quests/trollmire-treasure.lua

@@ -47,7 +47,7 @@ enter_level3 = function(self)
 	g.desc = "Beware!"
 	g.change_level_check = function()
 		require("engine.ui.Dialog"):yesnoPopup("Danger...", "This way lead to the lair of a mighty troll, traces of blood are everywhere. Are you sure?", function(ret)
-			if ret then game:changeLevel(4, "trollmire") end
+			if ret then game:changeLevel(4) end
 		end)
 		return true
 	end