Return shadow node if adding to a node that already has a shadow.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@3065 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CAnimatedMeshSceneNode.cpp

@@ -568,10 +568,7 @@ IShadowVolumeSceneNode* CAnimatedMeshSceneNode::addShadowVolumeSceneNode(const I
 		return 0;
 
 	if (Shadow)
-	{
-		os::Printer::log("This node already has a shadow.", ELL_WARNING);
-		return 0;
-	}
+		return Shadow;
 
 	if (!shadowMesh)
 		shadowMesh = Mesh; // if null is given, use the mesh of node