Add safe FX_Alloc2D() macro

core/src/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 "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fpdfapi/fpdf_page.h"
 #include "font_int.h"
 #include "../fpdf_cmaps/cmap_int.h"
@@ skipping 236 matching lines @@
         m_Status = 0;
     } else if (m_Status == 6) {
         m_pCMap->m_bVertical = CMap_GetCode(word);
         m_Status = 0;
     } else if (m_Status == 7) {
         if (word == FX_BSTRC("endcodespacerange")) {
             int nSegs = m_CodeRanges.GetSize();
             if (nSegs > 1) {
                 m_pCMap->m_CodingScheme = CPDF_CMap::MixedFourBytes;
                 m_pCMap->m_nCodeRanges = nSegs;
-                m_pCMap->m_pLeadingBytes = FX_Alloc(FX_BYTE, nSegs * sizeof(_CMap_CodeRange));
+                m_pCMap->m_pLeadingBytes = FX_Alloc2D(FX_BYTE, nSegs, sizeof(_CMap_CodeRange));
                 FXSYS_memcpy32(m_pCMap->m_pLeadingBytes, m_CodeRanges.GetData(), nSegs * sizeof(_CMap_CodeRange));
             } else if (nSegs == 1) {
                 m_pCMap->m_CodingScheme = (m_CodeRanges[0].m_CharSize == 2) ? CPDF_CMap::TwoBytes : CPDF_CMap::OneByte;
             }
             m_Status = 0;
         } else {
             if (word.GetLength() == 0 || word.GetAt(0) != '<') {
                 return;
             }
             if (m_CodeSeq % 2) {
@@ skipping 1324 matching lines @@
         if (middlecode > CID) {
             end = middle - 1;
         } else if (middlecode < CID) {
             begin = middle + 1;
         } else {
             return &Japan1_VertCIDs[middle].a;
         }
     }
     return NULL;
 }