message: Fix crash when verbosity is turned up
diff: @@ -84,7 +84,7 @@ std::shared_ptr<hal::Event> ComputeKernel::Run(const context::Context& ctx,
  CLObj<cl_event> done;
  auto local_work_size = ki_.lwork[0] ? ki_.lwork.data() : nullptr;
  auto event_wait_list = deps.size() ? deps.data() : nullptr;
  - IVLOG(4, "Running kernel, gwork = " << ki_.gwork << ", lwork = " << local_work_size[0]);
  + IVLOG(4, "Running kernel, gwork = " << ki_.gwork << ", lwork = " << (local_work_size ? local_work_size[0] : 0));
  Err err = ocl::EnqueueNDRangeKernel(queue.cl_queue.get(), // command_queue
  kernel_.get(), // kernel
  3, // work_dim
  