Method release

src/fl/audio/fft/fft.cpp.hpp:35–40

    }

    void release(fl::vector<float>&& v) {
        if (v.capacity() > 0 && mPool.size() < kMaxPoolSize) {
            v.clear();
            mPool.push_back(fl::move(v));
        }
    }

    void releaseIfNotEmpty(fl::vector<float>&& v) {
        if (!v.empty()) {