Use FXFONT defines in place of integers.

core/fpdfapi/fpdf_parser/cpdf_document.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_parser/include/cpdf_document.h"
 
 #include <set>
 
@@ skipping 243 matching lines @@
     int32_t iMid = (iStart + iEnd) / 2;
     const FX_LANG2CS& charset = gs_FXLang2CharsetTable[iMid];
     if (uCode == charset.uLang)
       return charset.uCharset;
 
     if (uCode < charset.uLang)
       iEnd = iMid - 1;
     else
       iStart = iMid + 1;
   }
-  return 0;
+  return FXFONT_ANSI_CHARSET;
 }
 
 uint8_t FX_GetCharsetFromLang(const FX_CHAR* pLang, int32_t iLength) {
   ASSERT(pLang);
   if (iLength < 0)
     iLength = FXSYS_strlen(pLang);
 
   uint32_t uHash = FX_GetLangHashCode(pLang);
   return FX_GetCsFromLangCode(uHash);
 }
@@ skipping 1172 matching lines @@
     }
   }
   pFontDesc->SetAtInteger("StemV", fStemV);
   AddIndirectObject(pFontDesc);
   pFontDict->SetAtReference("FontDescriptor", this, pFontDesc);
   CFRelease(traits);
   CFRelease(languages);
   return LoadFont(pBaseDict);
 }
 #endif  // _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_