Get rid of NULLs in fpdfsdk/

fpdfsdk/javascript/JS_Value.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 "fpdfsdk/javascript/JS_Value.h"
 
 #include <time.h>
 
@@ skipping 735 matching lines @@
     case 11:
       return day - 333 - leap;
     default:
       return 0;
   }
 }
 
 double JS_GetDateTime() {
   if (!FSDK_IsSandBoxPolicyEnabled(FPDF_POLICY_MACHINETIME_ACCESS))
     return 0;
-  time_t t = time(NULL);
+  time_t t = time(nullptr);
   struct tm* pTm = localtime(&t);
 
   int year = pTm->tm_year + 1900;
   double t1 = _TimeFromYear(year);
 
   return t1 + pTm->tm_yday * 86400000.0 + pTm->tm_hour * 3600000.0 +
          pTm->tm_min * 60000.0 + pTm->tm_sec * 1000.0;
 }
 
 int JS_GetYearFromTime(double dt) {
@@ skipping 126 matching lines @@
   for (size_t i = 0; i < nKeywords; ++i) {
     const wchar_t* property = va_arg(ap, const wchar_t*);
     v8::Local<v8::Value> v8Value =
         FXJS_GetObjectElement(pRuntime->GetIsolate(), pObj, property);
     if (!v8Value->IsUndefined())
       result[i] = CJS_Value(pRuntime, v8Value, CJS_Value::VT_unknown);
   }
   va_end(ap);
   return result;
 }