fix possible lua errors

modules/client_entergame/entergame.lua

@@ -56,8 +56,8 @@ function EnterGame.create()
   local account = Settings.get('account')
   local password = Settings.get('password')
   local host = Settings.get('host')
-  local port = tonumber(Settings.get('port'))
-  local autologin = toboolean(Settings.get('autologin'))
+  local port = Settings.getNumber('port')
+  local autologin = Settings.getBoolean('autologin')
 
   enterGame:getChildById('accountNameLineEdit'):setText(account)
   enterGame:getChildById('accountPasswordLineEdit'):setText(password)
@@ -90,7 +90,7 @@ function EnterGame.doLogin()
   EnterGame.account = enterGame:getChildById('accountNameLineEdit'):getText()
   EnterGame.password = enterGame:getChildById('accountPasswordLineEdit'):getText()
   EnterGame.host = enterGame:getChildById('serverHostLineEdit'):getText()
-  EnterGame.port = enterGame:getChildById('serverPortLineEdit'):getText()
+  EnterGame.port = tonumber(enterGame:getChildById('serverPortLineEdit'):getText())
   EnterGame.hide()
 
   Settings.set('host', EnterGame.host)

modules/client_options/options.lua

@@ -24,9 +24,14 @@ function Options.changeOption(key, status)
   if key == 'vsync' then
     g_window.setVerticalSync(status)
   elseif key == 'showfps' then
-    addEvent(function() rootWidget:recursiveGetChildById('frameCounter'):setVisible(status) end)
+    addEvent(function()
+      local frameCounter = rootWidget:recursiveGetChildById('frameCounter')
+      if frameCounter then frameCounter:setVisible(status) end
+    end)
   elseif key == 'fullscreen' then
-    addEvent(function() g_window.setFullscreen(status) end)
+    addEvent(function()
+      g_window.setFullscreen(status)
+    end)
   end
   Settings.set(key, status)
   Options[key] = status