- do not allow playing sounds during PlayerFinishLevel.

This gets called right before the level ends, any sound in here would play during the intermission or at the start of the next level.

# Conflicts:
#	src/sound/s_soundinternal.h

src/g_level.cpp

@@ -852,6 +852,8 @@ void G_DoCompleted (void)
 	// Intermission stats for entire hubs
 	G_LeavingHub(mode, thiscluster, &wminfo);
 
+	// Do not allow playing sounds in here - they'd never be able to play properly.
+	soundEngine->BlockNewSounds(true);
 	for (i = 0; i < MAXPLAYERS; i++)
 	{
 		if (playeringame[i])
@@ -859,6 +861,7 @@ void G_DoCompleted (void)
 			G_PlayerFinishLevel (i, mode, changeflags);
 		}
 	}
+	soundEngine->BlockNewSounds(false);
 
 	if (mode == FINISH_SameHub)
 	{ // Remember the level's state for re-entry.

src/sound/s_sound.cpp

@@ -384,7 +384,7 @@ FSoundChan *SoundEngine::StartSound(int type, const void *source,
 	FVector3 pos, vel;
 	FRolloffInfo *rolloff;
 
-	if (sound_id <= 0 || volume <= 0 || nosfx || nosound )
+	if (sound_id <= 0 || volume <= 0 || nosfx || nosound || blockNewSounds)
 		return NULL;
 
 	// prevent crashes.

src/sound/s_soundinternal.h

@@ -246,6 +246,7 @@ protected:
 	TArray<uint8_t> S_SoundCurve;
 	TMap<int, int> ResIdMap;
 	TArray<FRandomSoundList> S_rnd;
+	bool blockNewSounds = false;
 
 private:
 	void LinkChannel(FSoundChan* chan, FSoundChan** head);
@@ -273,6 +274,11 @@ public:
 	virtual ~SoundEngine() = default;
 	void EvictAllChannels();
 
+	void BlockNewSounds(bool on)
+	{
+		blockNewSounds = on;
+	}
+
 	void StopChannel(FSoundChan* chan);
 	sfxinfo_t* LoadSound(sfxinfo_t* sfx);