Fix more warnings on linux

Source/core/rendering/RenderImage.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved.
  *
@@ skipping 285 matching lines @@
 {
     LayoutUnit cWidth = contentWidth();
     LayoutUnit cHeight = contentHeight();
     LayoutUnit leftBorder = borderLeft();
     LayoutUnit topBorder = borderTop();
     LayoutUnit leftPad = paddingLeft();
     LayoutUnit topPad = paddingTop();
 
     GraphicsContext* context = paintInfo.context;
 
-    Page* page = 0;
-    if (Frame* frame = this->frame())
-        page = frame->page();
-
     if (!m_imageResource->hasImage() || m_imageResource->errorOccurred()) {
         if (paintInfo.phase == PaintPhaseSelection)
             return;
 
         if (cWidth > 2 && cHeight > 2) {
             const int borderWidth = 1;
 
             // Draw an outline rect where the image should be.
             context->setStrokeStyle(SolidStroke);
             context->setStrokeColor(Color::lightGray);
@@ skipping 284 matching lines @@
         return 0;
 
     ImageResource* cachedImage = m_imageResource->cachedImage();
     if (cachedImage && cachedImage->image() && cachedImage->image()->isSVGImage())
         return toSVGImage(cachedImage->image())->embeddedContentBox();
 
     return 0;
 }
 
 } // namespace WebCore