DMAudio fixes

src/audio/DMAudio.h

@@ -35,8 +35,6 @@ public:
 	uint8 GetNum3DProvidersAvailable(void);
 	char *Get3DProviderName(uint8 id);
 	
-	int8 AutoDetect3DProviders(void);
-	
 	int8 GetCurrent3DProviderIndex(void);
 	int8 SetCurrent3DProvider(uint8 which);
 	
@@ -86,6 +84,6 @@ public:
 
 	uint8 GetRadioInCar(void);
 	void SetRadioInCar(uint32 radio);
-	void SetRadioChannel(int8 radio, int32 pos);
+	void SetRadioChannel(uint8 radio, int32 pos);
 };
 extern cDMAudio DMAudio;