Fix #10224: Don't fast forward after autosave if tab key is no longer pressed

src/saveload/saveload.cpp

@@ -2920,7 +2920,10 @@ static inline void ClearSaveLoadState()
  */
 static void SaveFileStart()
 {
-	_sl.game_speed = _game_speed;
+	// If fast forward is via key, save normal game speed.
+	// If the key continues to be pressed, the graphics driver will continue to fast forward the game.
+	// If the key is released during autosave, the normal speed will be restored.
+	_sl.game_speed = VideoDriver::GetInstance()->isFastForwardViaKey() ? 100 : _game_speed;
 	_game_speed = 100;
 	SetMouseCursorBusy(true);
 

src/saveload/saveload.h

@@ -17,6 +17,7 @@
 #include <optional>
 #include <string>
 #include <vector>
+#include "../video/video_driver.hpp"
 
 /** SaveLoad versions
  * Previous savegame versions, the trunk revision where they were

src/video/video_driver.hpp

@@ -222,6 +222,9 @@ class VideoDriver : public Driver {
 		bool unlock; ///< Stores if the lock did anything that has to be undone.
 	};
 
+	bool isFastForwardViaKey(){
+		return fast_forward_via_key;
+	}
 protected:
 	const uint ALLOWED_DRIFT = 5; ///< How many times videodriver can miss deadlines without it being overly compensated.