Resolve light-source position/direction when updated

Source/core/svg/SVGFEPointLightElement.cpp

 /*
  * Copyright (C) 2005 Oliver Hunt <ojh16@student.canterbury.ac.nz>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 18 matching lines @@
 inline SVGFEPointLightElement::SVGFEPointLightElement(Document& document)
     : SVGFELightElement(SVGNames::fePointLightTag, document)
 {
     ScriptWrappable::init(this);
 }
 
 DEFINE_NODE_FACTORY(SVGFEPointLightElement)
 
 PassRefPtr<LightSource> SVGFEPointLightElement::lightSource(Filter* filter) const
 {
-    FloatPoint3D location(x()->currentValue()->value(), y()->currentValue()->value(), z()->currentValue()->value());
-    return PointLightSource::create(filter->resolve3dPoint(location));
+    return PointLightSource::create(filter->resolve3dPoint(position()));
 }
 
 }