Get rid of NULLs in xfa/fxbarcode/

xfa/fxbarcode/common/BC_GlobalHistogramBinarizer.cpp

Index: xfa/fxbarcode/common/BC_GlobalHistogramBinarizer.cpp
diff --git a/xfa/fxbarcode/common/BC_GlobalHistogramBinarizer.cpp b/xfa/fxbarcode/common/BC_GlobalHistogramBinarizer.cpp
index d4a33229cfe8bd00579fa42ce1d7250995b1c23f..53f18cc21bd16954366bd6d7bd9ce7d0e87dac47 100644
--- a/xfa/fxbarcode/common/BC_GlobalHistogramBinarizer.cpp
+++ b/xfa/fxbarcode/common/BC_GlobalHistogramBinarizer.cpp
@@ -87,7 +87,7 @@ CBC_CommonBitMatrix* CBC_GlobalHistogramBinarizer::GetBlackMatrix(int32_t& e) {
   for (y = 1; y < 5; y++) {
     int32_t row = height * y / 5;
     CFX_ByteArray* localLuminances = source->GetRow(row, m_luminance, e);
-    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
     int32_t right = (width << 2) / 5;
     int32_t x;
     for (x = width / 5; x < right; x++) {
@@ -96,7 +96,7 @@ CBC_CommonBitMatrix* CBC_GlobalHistogramBinarizer::GetBlackMatrix(int32_t& e) {
     }
   }
   int32_t blackPoint = EstimateBlackPoint(localBuckets, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   std::unique_ptr<CFX_ByteArray> localLuminances(source->GetMatrix());
   for (y = 0; y < height; y++) {
     int32_t offset = y * width;