Remove unneeded check in requestPaintingResource

Source/core/rendering/svg/RenderSVGResource.cpp

 /*
  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * 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.
@@ skipping 63 matching lines @@
 
         if (!svgStyle->hasFill())
             return 0;
     } else {
         if (!svgStyle->hasStroke() || isRenderingMask)
             return 0;
     }
 
     bool applyToFill = mode == ApplyToFillMode;
     SVGPaint::SVGPaintType paintType = applyToFill ? svgStyle->fillPaintType() : svgStyle->strokePaintType();
-    if (paintType == SVGPaint::SVG_PAINTTYPE_NONE)
-        return 0;
+    ASSERT(paintType != SVGPaint::SVG_PAINTTYPE_NONE);
 
     Color color;
     bool hasColor = false;
     switch (paintType) {
     case SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR:
     case SVGPaint::SVG_PAINTTYPE_RGBCOLOR:
     case SVGPaint::SVG_PAINTTYPE_RGBCOLOR_ICCCOLOR:
     case SVGPaint::SVG_PAINTTYPE_URI_CURRENTCOLOR:
     case SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR:
     case SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR_ICCCOLOR:
@@ skipping 117 matching lines @@
             // This will process the rest of the ancestors.
             toRenderSVGResourceContainer(current)->removeAllClientsFromCache();
             break;
         }
 
         current = current->parent();
     }
 }
 
 }