Add early-out in SVGTextChunkBuilder::finalizeTransformMatrices()

Source/core/layout/svg/SVGTextChunkBuilder.cpp

 /*
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 232 matching lines @@
 
         if (isVerticalText)
             fragment.y += textAnchorShift;
         else
             fragment.x += textAnchorShift;
     }
 }
 
 void SVGTextChunkBuilder::finalizeTransformMatrices(const Vector<SVGInlineTextBox*>& boxes) const
 {
+    if (m_textBoxTransformations.isEmpty())
+        return;
+
     for (SVGInlineTextBox* textBox : boxes) {
         AffineTransform textBoxTransformation = m_textBoxTransformations.get(textBox);
         if (textBoxTransformation.isIdentity())
             continue;
 
         for (SVGTextFragment& fragment : textBox->textFragments()) {
             ASSERT(fragment.lengthAdjustTransform.isIdentity());
             fragment.lengthAdjustTransform = textBoxTransformation;
         }
     }
 }
 
 }