[Etoys] [Bug] OggSound walkback

[Bert Freudenberg]

Open a SoundRecorder, make sure codec is set to Speex, record  
something, click the "morph" button to get an event morph (we should  
rename the button, btw), and delete the morph.

You'll (sometimes?) get a walkback - the SoundEventMorph tries to  
recompress the sound with a GSMCodec in #releaseCachedState which fails.

We should not recompress the sound in #releaseCachedState if it is  
already compressed, IMHO. But in general, recompressing should work,  
so that's still a bug.

- Bert -