Merge branch 'shadowdisable-fix' into 'master'

Make disableShadowsForStateSet a no-op when shadows are disabled

See merge request OpenMW/openmw!205

components/sceneutil/shadow.cpp

@@ -72,6 +72,9 @@ namespace SceneUtil
 
     void ShadowManager::disableShadowsForStateSet(osg::ref_ptr<osg::StateSet> stateset)
     {
+        if (!Settings::Manager::getBool("enable shadows", "Shadows"))
+            return;
+
         int numberOfShadowMapsPerLight = Settings::Manager::getInt("number of shadow maps", "Shadows");
         numberOfShadowMapsPerLight = std::max(1, std::min(numberOfShadowMapsPerLight, 8));