Code change to avoid signed/unsigned mismatch warnings

core/fpdfapi/fpdf_cmaps/fpdf_cmaps.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_cmaps/cmap_int.h"
 
 #include "core/fpdfapi/fpdf_font/font_int.h"
 #include "core/fpdfapi/include/cpdf_modulemgr.h"
 
 void FPDFAPI_FindEmbeddedCMap(const char* name,
                               int charset,
                               int coding,
                               const FXCMAP_CMap*& pMap) {
   pMap = NULL;
   CPDF_FontGlobals* pFontGlobals =
       CPDF_ModuleMgr::Get()->GetPageModule()->GetFontGlobals();
   const FXCMAP_CMap* pCMaps =
       pFontGlobals->m_EmbeddedCharsets[charset].m_pMapList;
-  int nCMaps = pFontGlobals->m_EmbeddedCharsets[charset].m_Count;
-  for (int i = 0; i < nCMaps; i++) {
-    if (FXSYS_strcmp(name, pCMaps[i].m_Name)) {
+  for (uint32_t i = 0; i < pFontGlobals->m_EmbeddedCharsets[charset].m_Count;
+       i++) {
+    if (FXSYS_strcmp(name, pCMaps[i].m_Name))
       continue;
-    }
     pMap = &pCMaps[i];
     break;
   }
 }
 extern "C" {
 static int compareWord(const void* p1, const void* p2) {
   return (*(uint16_t*)p1) - (*(uint16_t*)p2);
 }
 };
 extern "C" {
@@ skipping 146 matching lines @@
 }
 
 void FPDFAPI_LoadCID2UnicodeMap(CIDSet charset,
                                 const uint16_t*& pMap,
                                 uint32_t& count) {
   CPDF_FontGlobals* pFontGlobals =
       CPDF_ModuleMgr::Get()->GetPageModule()->GetFontGlobals();
   pMap = pFontGlobals->m_EmbeddedToUnicodes[charset].m_pMap;
   count = pFontGlobals->m_EmbeddedToUnicodes[charset].m_Count;
 }