Put more things under ifdef

src/audio/AudioManager.h

@@ -20,6 +20,8 @@ public:
 #ifndef GTA_PS2
 	int32 m_nLoopStart;
 	int32 m_nLoopEnd;
+#endif
+#ifdef EXTERNAL_3D_SOUND
 	uint8 m_nEmittingVolume;
 #endif
 	float m_fSpeedMultiplier;
@@ -285,7 +287,7 @@ public:
 	void GenerateIntegerRandomNumberTable(); // inlined on PS2
 	void LoadBankIfNecessary(uint8 bank); // this is used only on PS2 but technically not a platform code
 
-#ifdef GTA_PC
+#ifdef EXTERNAL_3D_SOUND // actually must have been && AUDIO_MSS as well
 	void AdjustSamplesVolume();
 	uint8 ComputeEmittingVolume(uint8 emittingVolume, float intensity, float dist);
 #endif
@@ -525,6 +527,11 @@ public:
 #define RESET_LOOP_OFFSETS
 #define SET_LOOP_OFFSETS(sample)
 #endif
+#ifdef EXTERNAL_3D_SOUND
+#define SET_EMITTING_VOLUME(vol) m_sQueueSample.m_nEmittingVolume = vol
+#else
+#define SET_EMITTING_VOLUME(vol)
+#endif
 
 #if defined(AUDIO_MSS) && !defined(PS2_AUDIO_CHANNELS)
 static_assert(sizeof(cAudioManager) == 19220, "cAudioManager: error");