Get rid of NULLs in xfa/fxbarcode/

xfa/fxbarcode/datamatrix/BC_DataMatrixWriter.cpp

Index: xfa/fxbarcode/datamatrix/BC_DataMatrixWriter.cpp
diff --git a/xfa/fxbarcode/datamatrix/BC_DataMatrixWriter.cpp b/xfa/fxbarcode/datamatrix/BC_DataMatrixWriter.cpp
index 03cd5fba505bbf15fcca91c3e05944347385dc97..f056ece25891af07f03dda4224ec828aa6bdd15e 100644
--- a/xfa/fxbarcode/datamatrix/BC_DataMatrixWriter.cpp
+++ b/xfa/fxbarcode/datamatrix/BC_DataMatrixWriter.cpp
@@ -55,29 +55,29 @@ uint8_t* CBC_DataMatrixWriter::Encode(const CFX_WideString& contents,
                                       int32_t& e) {
   if (outWidth < 0 || outHeight < 0) {
     e = BCExceptionHeightAndWidthMustBeAtLeast1;
-    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   }
   CBC_SymbolShapeHint::SymbolShapeHint shape =
       CBC_SymbolShapeHint::FORCE_SQUARE;
-  CBC_Dimension* minSize = NULL;
-  CBC_Dimension* maxSize = NULL;
+  CBC_Dimension* minSize = nullptr;
+  CBC_Dimension* maxSize = nullptr;
   CFX_WideString ecLevel;
   CFX_WideString encoded = CBC_HighLevelEncoder::encodeHighLevel(
       contents, ecLevel, shape, minSize, maxSize, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   CBC_SymbolInfo* symbolInfo = CBC_SymbolInfo::lookup(
       encoded.GetLength(), shape, minSize, maxSize, TRUE, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   CFX_WideString codewords =
       CBC_ErrorCorrection::encodeECC200(encoded, symbolInfo, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   CBC_DefaultPlacement* placement =
       new CBC_DefaultPlacement(codewords, symbolInfo->getSymbolDataWidth(e),
                                symbolInfo->getSymbolDataHeight(e));
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   placement->place();
   CBC_CommonByteMatrix* bytematrix = encodeLowLevel(placement, symbolInfo, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   outWidth = bytematrix->GetWidth();
   outHeight = bytematrix->GetHeight();
   uint8_t* result = FX_Alloc2D(uint8_t, outWidth, outHeight);
@@ -91,12 +91,12 @@ CBC_CommonByteMatrix* CBC_DataMatrixWriter::encodeLowLevel(
     CBC_SymbolInfo* symbolInfo,
     int32_t& e) {
   int32_t symbolWidth = symbolInfo->getSymbolDataWidth(e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   int32_t symbolHeight = symbolInfo->getSymbolDataHeight(e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   CBC_CommonByteMatrix* matrix = new CBC_CommonByteMatrix(
       symbolInfo->getSymbolWidth(e), symbolInfo->getSymbolHeight(e));
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   matrix->Init();
   int32_t matrixY = 0;
   for (int32_t y = 0; y < symbolHeight; y++) {