Fix all the code which has duplicate variable declarations

core/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/fpdfapi/fpdf_render/render_int.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 363 matching lines @@
         m_Status = 2;
       }
       if (ret1 == 2) {
         return ret1;
       }
       if (m_pColorSpace && m_bStdCS) {
         m_pColorSpace->EnableStdConversion(FALSE);
       }
       return ret1;
     }
-    FXCODEC_STATUS ret = pJbig2Module->ContinueDecode(m_pJbig2Context, pPause);
+    ret = pJbig2Module->ContinueDecode(m_pJbig2Context, pPause);
     if (ret < 0) {
       m_pCachedBitmap.reset();
       m_pGlobalStream.reset();
       pJbig2Module->DestroyJbig2Context(m_pJbig2Context);
       m_pJbig2Context = nullptr;
       return 0;
     }
     if (ret == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
       return 2;
     }
@@ skipping 462 matching lines @@
         int encoded_component = color_data % (1 << m_bpc);
         color_data /= 1 << m_bpc;
         color_value[j] = m_pCompData[j].m_DecodeMin +
                          m_pCompData[j].m_DecodeStep * encoded_component;
       }
       FX_FLOAT R = 0, G = 0, B = 0;
       if (m_nComponents == 1 && m_Family == PDFCS_ICCBASED &&
           m_pColorSpace->CountComponents() > 1) {
         int nComponents = m_pColorSpace->CountComponents();
         std::vector<FX_FLOAT> temp_buf(nComponents);
-        for (int i = 0; i < nComponents; i++) {
-          temp_buf[i] = *color_value;
+        for (int k = 0; k < nComponents; k++) {
+          temp_buf[k] = *color_value;
         }
         m_pColorSpace->GetRGB(temp_buf.data(), R, G, B);
       } else {
         m_pColorSpace->GetRGB(color_value, R, G, B);
       }
       SetPaletteArgb(i, ArgbEncode(255, FXSYS_round(R * 255),
                                    FXSYS_round(G * 255), FXSYS_round(B * 255)));
     }
   }
 }
@@ skipping 692 matching lines @@
                                    IFX_Pause* pPause) {
   return LoadHandle->Continue(pPause);
 }
 
 CPDF_ImageLoader::~CPDF_ImageLoader() {
   if (!m_bCached) {
     delete m_pBitmap;
     delete m_pMask;
   }
 }