CD-DA BGM playback support with SDL_mixer

This adds -playlist command line option to specify a "playlist" file
which lists music files to be played instead of CD audio tracks.
The format of playlist file is the same as xsystem35's.

src/sys/nact.cpp

@@ -16,7 +16,7 @@ extern SDL_Window* g_window;
 
 // 初期化
 
-NACT::NACT(const char* game_id, const char* font_file)
+NACT::NACT(const char* game_id, const char* font_file, const char* playlist)
 {
 	mouse_x = mouse_y = 0;
 
@@ -114,7 +114,7 @@ NACT::NACT(const char* game_id, const char* font_file)
 
 	// 各種クラス生成
 	ags = new AGS(this, font_file);
-	mako = new MAKO(this);
+	mako = new MAKO(this, playlist);
 
 #ifdef USE_JOY
 	// 入力初期化
@@ -409,11 +409,6 @@ int NACT::get_screen_height()
 	return ags->screen_height;
 }
 
-void NACT::notify_mci(int status)
-{
-	mako->notify_mci(status);
-}
-
 void NACT::select_cursor()
 {
 	ags->select_cursor();