message: fix cuda stream ifdefs
diff: @@ -1322,16 +1322,17 @@ ENOKI_EXPORT void cuda_eval(bool log_assembly) {
  ctx.live.clear();
  ctx.dirty.clear();
  + if (ctx.log_level >= 2 && sweeps.size() > 1)
  + std::cerr << "cuda_eval(): begin parallel group" << std::endl;
  +
  + #if ENOKI_CUDA_USE_STREAMS == 1
  if (ctx.streams.size() < sweeps.size()) {
  size_t cur = ctx.streams.size();
  ctx.streams.resize(sweeps.size());
  for (size_t i = cur; i < ctx.streams.size(); ++i)
  ctx.streams[i].init();
  }
  - if (ctx.log_level >= 2 && sweeps.size() > 1)
  - std::cerr << "cuda_eval(): begin parallel group" << std::endl;
  - #if ENOKI_CUDA_USE_STREAMS == 1
  cuda_check(cudaEventRecord(ctx.stream_0_event, nullptr));
  #endif
  