Cast fix in test.

test/bslightingshaderproperty_test.cpp

@@ -20,7 +20,7 @@ BOOST_AUTO_TEST_CASE(bslightingshaderproperty_test)
   // create a simple nif tree with BSLightingShaderProperty
   NiTriShapeRef shape = new NiTriShape;
   BSLightingShaderPropertyRef prop = new BSLightingShaderProperty;
-  shape->SetBSProperty(0, StaticCast<NiPropertyRef>(prop));
+  shape->SetBSProperty(0, StaticCast<NiProperty>(prop));
   BOOST_CHECK_NO_THROW(WriteNifTree(ss, shape));
   ss.seekg(0);
   NiObjectRef root;