AUDIO: Add a comment to explain the cleanup in 9b90d72

audio/softsynth/fluidsynth.cpp

@@ -517,6 +517,15 @@ void MidiDriver_FluidSynth::close() {
 
 	_mixer->stopHandle(_mixerSoundHandle);
 
+	/*
+	 * Don't delete the soundfont before cleaning up
+	 * Some parts of it are still in use and cause a timer thread to be
+	 * created to postpone the cleanup.
+	 * The "embedded" OS abstraction layer introduced in Fluidsynth 2.5 does
+	 * not supported threads and this causes a segfault when the final cleanup happens
+	 * just below.
+	 */
+
 	delete_fluid_synth(_synth);
 	delete_fluid_settings(_settings);
 }