Fixed some sound decoding issues in the MP3 java decoder.

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3656 4ab978e6-3352-0410-996c-0b42db0051c8
Avoid spamming "sceKernelUnlockLwMutex unknown uid/sceKernelLockLwMutex unknown uid" for uid=0.

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3657 4ab978e6-3352-0410-996c-0b42db0051c8