fix deadlock on startup when dropping first frame

src/client/game.cpp

@@ -1273,6 +1273,7 @@ void Game::run()
  && !(*kill || g_gamecallback->shutdown_requested
  || (server && server->isShutdownRequested()))) {
 
+
  float reward;
  bool terminal;
  if (sync_socket != nullptr) {
@@ -1312,6 +1313,7 @@ void Game::run()
  std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
  //warningstream << "Time difference = " << std::chrono::duration_cast<std::chrono::microseconds>(end - begin).count() << "[µs]" << std::endl;
 
+
  const irr::core::dimension2d<u32> &current_screen_size =
  m_rendering_engine->get_video_driver()->getScreenSize();
  // Verify if window size has changed and save it if it's the case
@@ -1348,7 +1350,10 @@ void Game::run()
 
 
  updateProfilers(stats, draw_times, dtime);
- processUserInput(dtime);
+ //skip if there is a recorder and it's the first iteration
+ if(!recorder || !firstIter){
+ processUserInput(dtime);
+ }
  // record action
  if(recorder && !firstIter) {
  pb_objects::Action lastAction = input->getLastAction();
@@ -1374,6 +1379,7 @@ void Game::run()
  resumeAnimation();
  }
 
+
  if (!m_is_paused)
  step(dtime);
  processClientEvents(&cam_view_target);