Fix resistance penalty none not saving

[Paliak]

Fixes #6281 .

Description of the problem being solved:

Due to the act10 penalty value being nil self.defaultState[var] == nil failing the if statement causing the function to return 0 since the val type is "number".

0 is also the value of the none settings causing it to not be saved.

PathOfBuilding/src/Classes/ConfigTab.lua

Lines 560 to 578 in 1981887

	function ConfigTabClass:GetDefaultState(var, varType)
	if self.placeholder[var] ~= nil then
	return self.placeholder[var]
	end
	if self.defaultState[var] ~= nil then
	return self.defaultState[var]
	end
	if varType == "number" then
	return 0
	elseif varType == "boolean" then
	return false
	elseif varType == "string" then
	return ""
	else
	return nil
	end
	end

PathOfBuilding/src/Modules/ConfigOptions.lua

Line 135 in 1981887

{ var = "resistancePenalty", type = "list", label = "Resistance penalty:", list = {{val=0,label="None"},{val=-30,label="Act 5 (-30%)"},{val=nil,label="Act 10 (-60%)"}}, defaultIndex = 3 },

PathOfBuilding/src/Classes/ConfigTab.lua

Lines 580 to 582 in 1981887

	function ConfigTabClass:Save(xml)
	for k, v in pairs(self.input) do
	if v ~= self:GetDefaultState(k, type(v)) then