Fix rabbits AI being broken by save-load

data/ai/micro_ais/mai-defs/animals.lua

@@ -85,6 +85,33 @@ end
 local rabbit_registry_counter = 0;
 local save_rabbit_spawn, save_rabbit_despawn
 
+local function register_rabbit_commands()
+	function wesnoth.custom_synced_commands.rabbit_despawn(cfg)
+		--TODO: maybe we only want to allow erasing of unit of certain types/sides/locations?
+		wesnoth.erase_unit(cfg.x, cfg.y)
+	end
+
+	function wesnoth.custom_synced_commands.rabbit_spawn(cfg)
+		--TODO: maybe we only want to allow creation of unit of certain types/sides/locations?
+		wesnoth.put_unit({ side = wesnoth.current.side, type = cfg.rabbit_type}, cfg.x, cfg.y)
+	end
+end
+
+function wesnoth.hooks.on_load(cfg)
+	local rabbits = wml.get_child(cfg, "micro_ai_rabbits")
+	if rabbits then
+		wml.remove_child(cfg, "micro_ai_rabbits")
+		rabbit_registry_counter = rabbits.counter
+		register_rabbit_commands()
+	end
+end
+
+function wesnoth.hooks.on_save(cfg)
+	if rabbit_registry_counter > 0 then
+		table.insert(cfg, wml.tag.micro_ai_rabbits{counter = rabbit_registry_counter})
+	end
+end
+
 function wesnoth.micro_ais.forest_animals(cfg)
 	local optional_keys = { "rabbit_type", "rabbit_number", "rabbit_enemy_distance", "rabbit_hole_img",
 		"tusker_type", "tusklet_type", "deer_type", "[filter_location]"
@@ -113,15 +140,7 @@ function wesnoth.micro_ais.forest_animals(cfg)
 
 		rabbit_registry_counter = rabbit_registry_counter + 1
 
-		function wesnoth.custom_synced_commands.rabbit_despawn(cfg)
-			--TODO: maybe we only want to allow erasing of unit of certain types/sides/locations?
-			wesnoth.erase_unit(cfg.x, cfg.y)
-		end
-
-		function wesnoth.custom_synced_commands.rabbit_spawn(cfg)
-			--TODO: maybe we only want to allow creation of unit of certain types/sides/locations?
-			wesnoth.put_unit({ side = wesnoth.current.side, type = cfg.rabbit_type}, cfg.x, cfg.y)
-		end
+		register_rabbit_commands()
 	end
 
     return {}, optional_keys, CA_parms