Re-enable warning 4701 for GN (re-land)

core/fpdfdoc/doc_form.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 <vector>
 
 #include "core/fpdfapi/fpdf_font/include/cpdf_fontencoding.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_page.h"
@@ skipping 396 matching lines @@
   if (csFontName == "ZapfDingbats")
     return pDocument->AddStandardFont(csFontName.c_str(), nullptr);
 
   CPDF_FontEncoding encoding(PDFFONT_ENCODING_WINANSI);
   return pDocument->AddStandardFont(csFontName.c_str(), &encoding);
 }
 
 CFX_ByteString CPDF_InterForm::GetNativeFont(uint8_t charSet, void* pLogFont) {
   CFX_ByteString csFontName;
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
-  LOGFONTA lf;
+  LOGFONTA lf = {};
   FX_BOOL bRet;
   if (charSet == ANSI_CHARSET) {
     csFontName = "Helvetica";
     return csFontName;
   }
   bRet = FALSE;
   if (charSet == SHIFTJIS_CHARSET) {
     bRet = RetrieveSpecificFont(charSet, DEFAULT_PITCH | FF_DONTCARE,
                                 "MS Mincho", lf);
   } else if (charSet == GB2312_CHARSET) {
@@ skipping 773 matching lines @@
     FDF_ImportField(pField, L"", bNotify);
   }
   if (bNotify && m_pFormNotify) {
     m_pFormNotify->AfterFormImportData(this);
   }
   return TRUE;
 }
 void CPDF_InterForm::SetFormNotify(const CPDF_FormNotify* pNotify) {
   m_pFormNotify = (CPDF_FormNotify*)pNotify;
 }