Fix FX_BOOL compilation errors under windows

core/src/fpdfapi/fpdf_edit/fpdf_edit_create.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/fxcrt/fx_ext.h"
 #include "../../../include/fpdfapi/fpdf_serial.h"
 #include "editint.h"
 
@@ skipping 733 matching lines @@
     }
     if (pFile->AppendString(FX_BSTRC("]/Size ")) < 0) {
         return FALSE;
     }
     if ((len = pFile->AppendDWord(objnum + 1)) < 0) {
         return FALSE;
     }
     offset += len + 7;
     if (m_PrevOffset > 0) {
         if (pFile->AppendString(FX_BSTRC("/Prev ")) < 0) {
-            return -1;
+            return FALSE;
         }
         FX_CHAR offset_buf[20];
         FXSYS_memset(offset_buf, 0, sizeof(offset_buf));
         FXSYS_i64toa(m_PrevOffset, offset_buf, 10);
         int32_t len = (int32_t)FXSYS_strlen(offset_buf);
         if (pFile->AppendBlock(offset_buf, len) < 0) {
-            return -1;
+            return FALSE;
         }
         offset += len + 6;
     }
     FX_BOOL bPredictor = TRUE;
     CPDF_FlateEncoder encoder;
     encoder.Initialize(m_Buffer.GetBuffer(), m_Buffer.GetLength(), pCreator->m_bCompress, bPredictor);
     if (pCreator->m_bCompress) {
         if (pFile->AppendString(FX_BSTRC("/Filter /FlateDecode")) < 0) {
             return FALSE;
         }
         offset += 20;
         if (bPredictor) {
             if ((len = pFile->AppendString(FX_BSTRC("/DecodeParms<</Columns 7/Predictor 12>>"))) < 0) {
                 return FALSE;
             }
             offset += len;
         }
     }
     if (pFile->AppendString(FX_BSTRC("/Length ")) < 0) {
         return FALSE;
     }
     if ((len = pFile->AppendDWord(encoder.m_dwSize)) < 0) {
         return FALSE;
     }
     offset += len + 8;
     if (bEOF) {
         if ((len = PDF_CreatorWriteTrailer(pCreator->m_pDocument, pFile, pCreator->m_pIDArray, pCreator->m_bCompress)) < 0) {
-            return -1;
+            return FALSE;
         }
         offset += len;
         if (pCreator->m_pEncryptDict) {
             FX_DWORD dwEncryptObjNum = pCreator->m_pEncryptDict->GetObjNum();
             if (dwEncryptObjNum == 0) {
                 dwEncryptObjNum = pCreator->m_dwEnryptObjNum;
             }
             if ((len = PDF_CreatorWriteEncrypt(pCreator->m_pEncryptDict, dwEncryptObjNum, pFile)) < 0) {
-                return -1;
+                return FALSE;
             }
             offset += len;
         }
     }
     if ((len = pFile->AppendString(FX_BSTRC(">>stream\r\n"))) < 0) {
         return FALSE;
     }
     offset += len;
     if (pFile->AppendBlock(encoder.m_pData, encoder.m_dwSize) < 0) {
         return FALSE;
@@ skipping 1318 matching lines @@
     m_bNewCrypto = FALSE;
     if (!m_bStandardSecurity) {
         return;
     }
     if (m_pEncryptDict) {
         m_pEncryptDict->Release();
         m_pEncryptDict = NULL;
     }
     m_bStandardSecurity = FALSE;
 }