Don't display previous subtitles all at once when subtitles are enabled mid-audio play

(cherry picked from commit 40f200e066)

Sources/Plasma/PubUtilLib/plAudio/plWin32Sound.cpp

@@ -111,17 +111,19 @@ void plWin32Sound::IFreeBuffers( void )
 void plWin32Sound::Update()
 {
 	plSoundBuffer* buf = GetDataBuffer();
-	if (plgAudioSys::AreSubtitlesEnabled() && buf != nullptr) {
+	if (buf != nullptr) {
 		plSrtFileReader* srtReader = buf->GetSrtReader();
 		if (srtReader != nullptr) {
 			uint32_t currentTimeMs = (uint32_t)(GetActualTimeSec() * 1000.0f);
 			while (plSrtEntry* nextEntry = srtReader->GetNextEntryStartingBeforeTime(currentTimeMs)) {
+				if (plgAudioSys::AreSubtitlesEnabled()) {
 					// add a plSubtitleMsg to go... to whoever is listening (probably the KI)
 					plSubtitleMsg* msg = new plSubtitleMsg(nextEntry->GetSubtitleText(), nextEntry->GetSpeakerName());
 					msg->Send();
 				}
 			}
 		}
+	}
 
 	plSound::Update();
 }