Optimize ents.FindByClassAndParent

[Astralcircle]

Optimizes this function by about 25%

Benchmark code:

local SysTime = SysTime
local ipairs = ipairs
local MsgN = MsgN

function GMODBenchmark(repeats, ...)
    local times = {}

    for k, benchmark_function in ipairs({...}) do
        local start_time = SysTime()

        for i = 1, repeats do
            benchmark_function()
        end

        local end_time = SysTime()
        times[k] = end_time - start_time
    end

    MsgN(string.format("\nBenchmark result %s:", SERVER and "(SERVER)" or "(CLIENT)"))
    for k, v in ipairs(times) do
        MsgN(k, ": " .. v)
    end
end

Result:

Benchmark result (SERVER):
1: 0.26664929999993
2: 0.35286960000008

[aStonedPenguin]

Just use ipairs. With jit it should be the same speed, and cleaner.