Merge "blast: fix dropped 32 bits of layer_state_t::what"

        uint64_t cacheId = 0;

        status_t ret = BufferCache::getInstance().getCacheId(s->buffer, &cacheId);

        if (ret == NO_ERROR) {

            s->what &= ~static_cast<uint32_t>(layer_state_t::eBufferChanged);

            s->what &= ~static_cast<uint64_t>(layer_state_t::eBufferChanged);

            s->buffer = nullptr;

        } else {

            cacheId = BufferCache::getInstance().cache(s->buffer);