Added test for node subclassing/parent parameter bug workaround (#143).
Added test for node subclassing/parent parameter bug workaround (#143).

svn path=/trunk/libavg/; revision=5228

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