Sample rate test

struct SRateTest : Module
{
    float srate;

    SRateTest() : Module(0, 0, 1, 0), srate(0)  { srate = engineGetSampleRate(); }

    void onSampleRateChange() override          { srate = engineGetSampleRate(); }
    void onCreate() override                    { srate = engineGetSampleRate(); }

    void step() override                        { outputs[0].value = srate > 0.0f ? 1.0f : 0.0f; }
};