Get rid of special casing for SVGNumber in the bindings generator

Source/core/svg/SVGNumberList.cpp

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  *
  * 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,
@@ skipping 46 matching lines @@
 
 String SVGNumberList::valueAsString() const
 {
     StringBuilder builder;
 
     unsigned size = this->size();
     for (unsigned i = 0; i < size; ++i) {
         if (i > 0)
             builder.append(' ');
 
-        builder.append(String::number(at(i)));
+        builder.append(at(i).valueAsString());
     }
 
     return builder.toString();
 }
 
 }