refactor(recorder): Replace fopen with FileSystem in Replay Recorder (#1233)

Author: Mauller

Generals/Code/GameEngine/Include/Common/Recorder.h

@@ -28,6 +28,8 @@
 #include "Common/MessageStream.h"
 #include "GameNetwork/GameInfo.h"
 
+class File;
+
 /**
   * The ReplayGameInfo class holds information about the replay game and
 	* the contents of its slot list for reconstructing multiplayer games.
@@ -154,7 +156,7 @@ class RecorderClass : public SubsystemInterface {
 
 	CullBadCommandsResult cullBadCommands(); ///< prevent the user from giving mouse commands that he shouldn't be able to do during playback.
 
-	FILE *m_file;
+	File* m_file;
 	AsciiString m_fileName;
 	Int m_currentFilePosition;
 	RecorderModeType m_mode;