Starting in Winter Uses Incorrect Season Length

If winter is set as the starting season, and its length is set to default, the season changes on day 21 instead of 16. Any other season length besides default in the world options don't have the issue. After a full year cycle, winter's length returns to 15 days. If summer is set as the starting season, it ends on day 16 as expected.

scripts\map\forest_map.lua

local function seasonfn(friendly, winter)
	return function(season)
		local totaldaysinseason
		local remainingdaysinseason
		if friendly then
			totaldaysinseason = TUNING.SEASON_LENGTH_FRIENDLY_DEFAULT*2
			remainingdaysinseason = TUNING.SEASON_LENGTH_FRIENDLY_DEFAULT
		else
			totaldaysinseason = TUNING.SEASON_LENGTH_HARSH_DEFAULT
			remainingdaysinseason = TUNING.SEASON_LENGTH_HARSH_DEFAULT
		end
		local seasons = {
			season = season,
			totaldaysinseason = totaldaysinseason,
			elapseddaysinseason = 0,
			remainingdaysinseason = remainingdaysinseason,
		}
		return {seasons = seasons, weather = winter and {snowlevel = 1} or nil}
	end
end

local SEASONS = {
	["autumn"] = seasonfn(true),
	["winter"] = seasonfn(true, true),
	["spring"] = seasonfn(true),
	["summer"] = seasonfn(false),
}

In SEASONS ["winter"] should probably be seasonfn(false, true)