move clear_menu_item to lua implementation

data/lua/wml-tags.lua

@@ -1322,6 +1322,10 @@ function wml_actions.disallow_end_turn(cfg)
 	wesnoth.allow_end_turn(false)
 end
 
+function wml_actions.clear_menu_item(cfg)
+	wesnoth.clear_menu_item(cfg.id)
+end
+
 function wml_actions.set_menu_item(cfg)
 	wesnoth.set_menu_item(cfg.id, cfg)
 end

src/game_events/action_wml.cpp

@@ -555,19 +555,6 @@ WML_HANDLER_FUNCTION(clear_global_variable,/**/,pcfg)
 		verify_and_clear_global_variable(pcfg);
 }
 
-WML_HANDLER_FUNCTION(clear_menu_item, /*event_info*/, cfg)
-{
-	const std::string ids = cfg["id"].str();
-	BOOST_FOREACH(const std::string& id, utils::split(ids, ',', utils::STRIP_SPACES)) {
-		if(id.empty()) {
-			WRN_NG << "[clear_menu_item] has been given an empty id=, ignoring" << std::endl;
-			continue;
-		}
-
-		resources::gamedata->get_wml_menu_items().erase(id);
-	}
-}
-
 WML_HANDLER_FUNCTION(color_adjust, /*event_info*/, cfg)
 {
 	game_display &screen = *resources::screen;

src/scripting/game_lua_kernel.cpp

@@ -783,6 +783,20 @@ int game_lua_kernel::intf_set_menu_item(lua_State *L)
 	return 0;
 }
 
+int game_lua_kernel::intf_clear_menu_item(lua_State *L)
+{
+	std::string ids(luaL_checkstring(L, 1));
+	BOOST_FOREACH(const std::string& id, utils::split(ids, ',', utils::STRIP_SPACES)) {
+		if(id.empty()) {
+			WRN_LUA << "[clear_menu_item] has been given an empty id=, ignoring" << std::endl;
+			continue;
+		}
+
+		gamedata().get_wml_menu_items().erase(id);
+	}
+	return 0;
+}
+
 int game_lua_kernel::intf_shroud_op(lua_State *L, bool place_shroud)
 {
 	vconfig cfg = luaW_checkvconfig(L, 1);
@@ -3069,6 +3083,7 @@ game_lua_kernel::game_lua_kernel(const config &cfg, CVideo * video, game_state &
 		{ "add_tile_overlay",		boost::bind(&game_lua_kernel::intf_add_tile_overlay, this, _1)			},
 		{ "allow_end_turn",		boost::bind(&game_lua_kernel::intf_allow_end_turn, this, _1)			},
 		{ "allow_undo",			boost::bind(&game_lua_kernel::intf_allow_undo, this, _1)			},
+		{ "clear_menu_item",		boost::bind(&game_lua_kernel::intf_clear_menu_item, this, _1)			},
 		{ "clear_messages",		boost::bind(&game_lua_kernel::intf_clear_messages, this, _1)			},
 		{ "delay",			boost::bind(&game_lua_kernel::intf_delay, this, _1)				},
 		{ "extract_unit",		boost::bind(&game_lua_kernel::intf_extract_unit, this, _1)			},

src/scripting/game_lua_kernel.hpp

@@ -107,6 +107,7 @@ class game_lua_kernel : public lua_kernel_base
 	int intf_extract_unit(lua_State *L);
 	int intf_find_vacant_tile(lua_State *L);
 	int intf_float_label(lua_State *L);
+	int intf_clear_menu_item(lua_State *L);
 	int intf_set_menu_item(lua_State *L);
 	int intf_shroud_op(lua_State *L, bool place_shroud);
 	int intf_simulate_combat(lua_State *L);