Initialize FMOD pointers to NULL, so that the validation checks will also work correctly in Release builds

engine/Quake/bgmusic.c

@@ -39,10 +39,10 @@ static qboolean	no_extmusic = false;
 static float	old_volume = -1.0f;
 
 extern FMOD_SYSTEM *fmod_system;
-FMOD_CHANNELGROUP *bgm_channelGroup;
-FMOD_CHANNEL *bgm_channel;
-FMOD_SOUND *bgm_sound;
-byte *bgm_data;
+FMOD_CHANNELGROUP *bgm_channelGroup = NULL;
+FMOD_CHANNEL *bgm_channel = NULL;
+FMOD_SOUND *bgm_sound = NULL;
+byte *bgm_data = NULL;
 
 static const char *extensions[] =
 {

engine/Quake/snd_fmod.c

@@ -4,6 +4,6 @@
 #include "fmod.h"
 #include "fmod_errors.h"
 
-FMOD_SYSTEM *fmod_system;
+FMOD_SYSTEM *fmod_system = NULL;
 
 #endif	// USE_FMOD