--- a/src/hal.h	Mon Mar 19 09:33:17 2007 +0000
+++ b/src/hal.h	Mon Mar 19 12:38:16 2007 +0000
@@ -5,34 +5,34 @@
 #ifndef HAL_H
 #define HAL_H
 
-typedef struct {
+struct HalCommonDriver {
 	const char *(*start)(const char * const *parm);
-	void (*stop)(void);
-} HalCommonDriver;
+	void (*stop)();
+};
 
-typedef struct {
+struct HalVideoDriver {
 	const char *(*start)(const char * const *parm);
-	void (*stop)(void);
+	void (*stop)();
 	void (*make_dirty)(int left, int top, int width, int height);
-	void (*main_loop)(void);
+	void (*main_loop)();
 	bool (*change_resolution)(int w, int h);
 	void (*toggle_fullscreen)(bool fullscreen);
-} HalVideoDriver;
+};
 
-typedef struct {
+struct HalSoundDriver {
 	const char *(*start)(const char * const *parm);
-	void (*stop)(void);
-} HalSoundDriver;
+	void (*stop)();
+};
 
-typedef struct {
+struct HalMusicDriver {
 	const char *(*start)(const char * const *parm);
-	void (*stop)(void);
+	void (*stop)();
 
 	void (*play_song)(const char *filename);
-	void (*stop_song)(void);
-	bool (*is_song_playing)(void);
+	void (*stop_song)();
+	bool (*is_song_playing)();
 	void (*set_volume)(byte vol);
-} HalMusicDriver;
+};
 
 extern HalMusicDriver *_music_driver;
 extern HalSoundDriver *_sound_driver;