Fixed build with OSG_USE_REF_PTR_IMPLICIT_OUTPUT_CONVERSION set to OFF
Fixed build with OSG_USE_REF_PTR_IMPLICIT_OUTPUT_CONVERSION set to OFF

scrawl/osg,scrawl/osg,openscenegraph/osg,scrawl/osg,openscenegraph/osg,openscenegraph/osg,openscenegraph/osg,scrawl/osg