WC: Fix invest dialog

data/campaigns/World_Conquest/lua/game_mechanics/invest/invest.lua

@@ -137,7 +137,7 @@ function wc2_invest.invest()
 	local deserters_available = stringx.split(side.variables["wc2.deserters"] or "")
 	local trainings_available = wc2_training.list_available(side_num, {2,3,4,5,6})
 	local gold_available = true
-	for i =1,2 do
+	for i = 1,2 do
 		local is_local = false
 		local res = wesnoth.synchronize_choice(_"WC2 Invest", function()
 			is_local = true

data/campaigns/World_Conquest/lua/game_mechanics/invest/invest_show_dialog.lua

@@ -154,7 +154,7 @@ function wc2_show_invest_dialog_impl(args)
 			page.info_label.label = _"Gives 70 gold and places a village on your keep."
 		end
 
-		function root_node.on_modified()
+		local function set_result()
 			local selected = root_node.selected_item_path
 			local selected_data = index_map[table.concat(selected, '_')]
 			if selected_data ~= nil then
@@ -162,6 +162,9 @@ function wc2_show_invest_dialog_impl(args)
 			end
 			res = selected_data.res
 		end
+
+		root_node.on_modified = set_result
+		set_result()
 	end
 	local d_res = gui.show_dialog(dialog_wml, preshow)
 	return d_res, res