because it uses strtok() to modify the environment variable in
place, it only works correctly the first time it's called.
Subsequent calls only see the first directory listed in the
variable. This causes applications such as Audacious to fail
because the Pulse plugin is not in the first directory. However, we
don't actually need $ALSA_PLUGIN_DIRS, because /etc/asound.conf
allows the full path to the Pulse plugin to be specified.
svn path=/nixos/trunk/; revision=27960
8bf3c2c1bf