PRNG for Lua 4.0?

[Michael Horvath <mikh2161@...>]

I found this set of pseudo random number generators here:

https://love2d.org/forums/viewtopic.php?f=5&t=3424

Here's my attempt to translate it from Lua 5 to Lua 4:

--Linear Congruential Generator
function lcg(s, r)
    local temp = {}
    function temp:random(a, b)
        local y = mod(self.a * self.x + self.c, self.m)
        self.x = y
        if not a then
            return y / 65536
        elseif not b then
            if a == 0 then
                return y
            else
                return 1 + mod(y, a)
            end
        else
            return a + mod(y, b - a + 1)
        end
    end
    function temp:randomseed(s)
        if not s then
            s = seed()
        end
        self.x = mod(s, 2147483648)
    end
    if r then
        --from Numerical Recipes
        if r == 'nr' then
            temp.a = 1664525
            temp.c = 1013904223
            temp.m = 65536
        --from MVC
        elseif r == 'mvc' then
            temp.a = 214013
            temp.c = 2531011
            temp.m = 65536
        end
    --from Ansi C
    else
        temp.a = 1103515245
        temp.c = 12345
        temp.m = 65536
    end
    temp:randomseed(s)
    return temp
end

print("wutwut =" .. lcg(0):random())
print("wutwut =" .. lcg(0):random())
print("wutwut =" .. lcg(0):random())

However, the output is always the same number. What am I doing wrong?

Mike