Get rid of most instance of 'foo == NULL'

core/src/fxcodec/codec/fx_codec.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 "core/include/fxcodec/fx_codec.h"
 
 #include <cmath>
@@ skipping 150 matching lines @@
       continue;                              \
     }                                        \
   }
 
 extern "C" double FXstrtod(const char* nptr, char** endptr) {
   double ret = 0.0;
   const char* ptr = nptr;
   const char* exp_ptr = NULL;
   int e_number = 0, e_signal = 0, e_point = 0, is_negative = 0;
   int exp_ret = 0, exp_sig = 1, fra_ret = 0, fra_count = 0, fra_base = 1;
-  if (nptr == NULL) {
+  if (!nptr) {
     return 0.0;
   }
   for (;; ptr++) {
     if (!e_number && !e_point && (*ptr == '\t' || *ptr == ' '))
       continue;
 
     if (std::isdigit(*ptr)) {
       if (!e_number)
         e_number = 1;
 
@@ skipping 272 matching lines @@
     int nComps,
     int bpc) {
   CCodec_RLScanlineDecoder* pRLScanlineDecoder = new CCodec_RLScanlineDecoder;
   if (!pRLScanlineDecoder->Create(src_buf, src_size, width, height, nComps,
                                   bpc)) {
     delete pRLScanlineDecoder;
     return NULL;
   }
   return pRLScanlineDecoder;
 }