Fix compilation with strict format checking

fpdfsdk/fsdk_baseannot.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 <algorithm>
 
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
@@ skipping 271 matching lines @@
 
 CFX_ByteString CPDFSDK_DateTime::ToCommonDateTimeString() {
   CFX_ByteString str1;
   str1.Format("%04d-%02u-%02u %02u:%02u:%02u ", dt.year, dt.month, dt.day,
               dt.hour, dt.minute, dt.second);
   if (dt.tzHour < 0)
     str1 += "-";
   else
     str1 += "+";
   CFX_ByteString str2;
-  str2.Format("%02d:%02u", abs(dt.tzHour), dt.tzMinute);
+  str2.Format("%02d:%02u", std::abs(static_cast<int>(dt.tzHour)), dt.tzMinute);
   return str1 + str2;
 }
 
 CFX_ByteString CPDFSDK_DateTime::ToPDFDateTimeString() {
   CFX_ByteString dtStr;
   char tempStr[32];
   memset(tempStr, 0, sizeof(tempStr));
   FXSYS_snprintf(tempStr, sizeof(tempStr) - 1, "D:%04d%02u%02u%02u%02u%02u",
                  dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second);
   dtStr = CFX_ByteString(tempStr);
   if (dt.tzHour < 0)
     dtStr += CFX_ByteString("-");
   else
     dtStr += CFX_ByteString("+");
   memset(tempStr, 0, sizeof(tempStr));
-  FXSYS_snprintf(tempStr, sizeof(tempStr) - 1, "%02d'%02u'", abs(dt.tzHour),
-                 dt.tzMinute);
+  FXSYS_snprintf(tempStr, sizeof(tempStr) - 1, "%02d'%02u'",
+                 std::abs(static_cast<int>(dt.tzHour)), dt.tzMinute);
   dtStr += CFX_ByteString(tempStr);
   return dtStr;
 }
 
 void CPDFSDK_DateTime::ToSystemTime(FX_SYSTEMTIME& st) {
   time_t t = this->ToTime_t();
   struct tm* pTime = localtime(&t);
   if (pTime) {
     st.wYear = static_cast<uint16_t>(pTime->tm_year) + 1900;
     st.wMonth = static_cast<uint16_t>(pTime->tm_mon) + 1;
@@ skipping 579 matching lines @@
   return m_pPageView ? m_pPageView->GetPDFPage() : nullptr;
 }
 
 #ifdef PDF_ENABLE_XFA
 
 CPDFXFA_Page* CPDFSDK_Annot::GetPDFXFAPage() {
   return m_pPageView ? m_pPageView->GetPDFXFAPage() : nullptr;
 }
 
 #endif  // PDF_ENABLE_XFA