Better fix for snprintf non-termination on windows.

core/src/fxcrt/fx_basic_wstring.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_basic.h"
 #include "../../../third_party/base/numerics/safe_math.h"
 
 static CFX_StringDataW* FX_AllocStringW(int nLen)
@@ skipping 958 matching lines @@
                     nItemLen = 128;
                     if (nItemLen < nWidth + nPrecision) {
                         nItemLen = nWidth + nPrecision;
                     }
                     break;
                 case 'f':
                     if (nWidth + nPrecision > 100) {
                         nItemLen = nPrecision + nWidth + 128;
                     } else {
                         double f;
-                        char pszTemp[256] = {0};
+                        char pszTemp[256];
                         f = va_arg(argList, double);
-                        FXSYS_snprintf(pszTemp, sizeof(pszTemp) - 1, "%*.*f", nWidth, nPrecision + 6, f );
+                        FXSYS_snprintf(pszTemp, sizeof(pszTemp), "%*.*f", nWidth, nPrecision + 6, f );
                         nItemLen = (FX_STRSIZE)FXSYS_strlen(pszTemp);
                     }
                     break;
                 case 'p':
                     va_arg(argList, void*);
                     nItemLen = 32;
                     if (nItemLen < nWidth + nPrecision) {
                         nItemLen = nWidth + nPrecision;
                     }
                     break;
@@ skipping 124 matching lines @@
             return (CFX_CharMap*)&g_DefaultJISMapper;
         case 936:
             return (CFX_CharMap*)&g_DefaultGBKMapper;
         case 949:
             return (CFX_CharMap*)&g_DefaultUHCMapper;
         case 950:
             return (CFX_CharMap*)&g_DefaultBig5Mapper;
     }
     return NULL;
 }