Added test for broken Sound::setVolume (see bug #24).
Added test for broken Sound::setVolume (see bug #24).

svn path=/trunk/libavg/; revision=3099

hoodie/libavg,hoodie/libavg,th3infinity/libavg,yyd01245/libavg,th3infinity/libavg,scotty007/libavg,yyd01245/libavg,scotty007/libavg,th3infinity/libavg,libavg/libavg,hoodie/libavg,yyd01245/libavg,scotty007/libavg,th3infinity/libavg,libavg/libavg,libavg/libavg,libavg/libavg,hoodie/libavg,scotty007/libavg,yyd01245/libavg