Get rid of NULLs in xfa/fxbarcode/

xfa/fxbarcode/qrcode/BC_QRAlignmentPatternFinder.cpp

Index: xfa/fxbarcode/qrcode/BC_QRAlignmentPatternFinder.cpp
diff --git a/xfa/fxbarcode/qrcode/BC_QRAlignmentPatternFinder.cpp b/xfa/fxbarcode/qrcode/BC_QRAlignmentPatternFinder.cpp
index 75565ca64130d86d897f6d0249ce5f7238f46164..efc1014188cdf2fa9f5bbd6543502ec58e97bfaf 100644
--- a/xfa/fxbarcode/qrcode/BC_QRAlignmentPatternFinder.cpp
+++ b/xfa/fxbarcode/qrcode/BC_QRAlignmentPatternFinder.cpp
@@ -105,8 +105,8 @@ CBC_QRAlignmentPattern* CBC_QRAlignmentPatternFinder::Find(int32_t& e) {
     return m_possibleCenters[0]->Clone();
   }
   e = BCExceptionRead;
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-  return NULL;
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
+  return nullptr;
 }
 FX_FLOAT CBC_QRAlignmentPatternFinder::CenterFromEnd(
     const CFX_Int32Array& stateCount,
@@ -195,5 +195,5 @@ CBC_QRAlignmentPattern* CBC_QRAlignmentPatternFinder::HandlePossibleCenter(
     m_possibleCenters.Add(
         new CBC_QRAlignmentPattern(centerJ, centerI, estimatedModuleSize));
   }
-  return NULL;
+  return nullptr;
 }