Re-enable several MSVC warnings

core/fpdfapi/fpdf_font/fpdf_font_cid.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_font/font_int.h"
 
 #include "core/fpdfapi/fpdf_cmaps/cmap_int.h"
 #include "core/fpdfapi/fpdf_font/ttgsubtable.h"
@@ skipping 1567 matching lines @@
 }
 void CPDF_CIDFont::LoadSubstFont() {
   m_Font.LoadSubst(m_BaseFont, !m_bType1, m_Flags, m_StemV * 5, m_ItalicAngle,
                    g_CharsetCPs[m_Charset], IsVertWriting());
 }
 void CPDF_CIDFont::LoadMetricsArray(CPDF_Array* pArray,
                                     CFX_DWordArray& result,
                                     int nElements) {
   int width_status = 0;
   int iCurElement = 0;
-  int first_code = 0, last_code;
+  int first_code = 0;
+  int last_code = 0;
   FX_DWORD count = pArray->GetCount();
   for (FX_DWORD i = 0; i < count; i++) {
     CPDF_Object* pObj = pArray->GetElementValue(i);
     if (!pObj)
       continue;
 
     if (CPDF_Array* pArray = pObj->AsArray()) {
       if (width_status != 1)
         return;
 
@@ skipping 68 matching lines @@
 
 const uint8_t* CPDF_CIDFont::GetCIDTransform(FX_WORD CID) const {
   if (m_Charset != CIDSET_JAPAN1 || m_pFontFile)
     return nullptr;
 
   const struct CIDTransform* found = (const struct CIDTransform*)FXSYS_bsearch(
       &CID, g_Japan1_VertCIDs, FX_ArraySize(g_Japan1_VertCIDs),
       sizeof(g_Japan1_VertCIDs[0]), CompareCIDTransform);
   return found ? &found->a : nullptr;
 }