incorrect emit for arrow functions defined in the scope of a function that is used as a default parameter

[Nowaaru]

Oh God, the edge case
- Dionysusnu

Repro from fireboltofdeath is here.

Expected emit is to be something like this:

-- Compiled with roblox-ts v2.1.0
local x = function(f)
	if f == nil then
		f = function()
                        local y
			y = function()
				return print(y)
			end
		end
	end
	return nil
end
return nil

_{sorry fireboltofdeath for making this so hard, i am not very bright}