Removed various assert() instances since these were causing crashes.
Removed various assert() instances since these were causing crashes.

From Alberto, changed the use of the DynGeoSet to it was querried on demand
rather than used as a pointer which was originally being invalidate before
use.


marchelbling/osg,tomasthoresen/osg,marchelbling/osg,artoolkit/osg,tomasthoresen/osg,artoolkit/osg,jtorresfabra/osg,openscenegraph/osg,scrawl/osg,marchelbling/osg,openscenegraph/osg,artoolkit/osg,openscenegraph/osg,jtorresfabra/osg,openscenegraph/osg,jtorresfabra/osg,artoolkit/osg,tomasthoresen/osg,scrawl/osg,scrawl/osg,tomasthoresen/osg,scrawl/osg,jtorresfabra/osg,marchelbling/osg