Squeezelite no audio after not playing for period X

```
What steps will reproduce the problem?
1. Start squeezelite-i386 v1.2
2. Play some audio and after a while press stop to stop playing sound
3. Keep the machine running for some time
4. Again try to play some audio
5. Notice that audio seem to be playing but there is no actual audio output on
the system

What is the expected output? What do you see instead?

Expected audio output but got none although the player seems to be playing

What version of the product are you using? On what operating system?

squeezelite-i386 v1.2 on Ubuntu 12.04.3 LTS \n \l

The issue is solved when squeezelite-i386 is restarted

The process is started for /etc/rc.local using

/usr/local/bin/squeezelite-i386 -n Kantoor -d all=debug -f
/var/log/squeezelite.log -z -a 80 192.168.178.200

But also the following rule has the issue /usr/local/bin/squeezelite-i386 -n
Kantoor -z -a 80 192.168.178.200

Note: When using version 1.1 i never noticed this issue but it it not running
24x7

```

Original issue reported on code.google.com by `raymon...@zonnet.nl` on 26 Sep 2013 at 8:12