Merge branch 'clsb-warning' into 'master'

Hopefully fix Clang warning about hiding overloaded virtual functions

See merge request OpenMW/openmw!82

components/sceneutil/mwshadowtechnique.hpp

@@ -101,6 +101,8 @@ namespace SceneUtil {
 
             void apply(osg::Camera&);
 
+            using osg::NodeVisitor::apply;
+
             void updateBound(const osg::BoundingBox& bb);
 
             void update(const osg::Vec3& v);