Replaced ref_ptr<>:take with ref_ptr<>:release, and added handling of removeal

of ref_ptr<> operator >.

src/osgFX/AnisotropicLighting.cpp

@@ -105,7 +105,7 @@ namespace
                 *(image->data(j, i)+2) = static_cast<unsigned char>(blue * 255);
             }
         }
-        return image.take();
+        return image.release();
     }
 
 }