Get rid of NULLs in xfa/

xfa/fxfa/parser/xfa_document_datadescription_imp.cpp

Index: xfa/fxfa/parser/xfa_document_datadescription_imp.cpp
diff --git a/xfa/fxfa/parser/xfa_document_datadescription_imp.cpp b/xfa/fxfa/parser/xfa_document_datadescription_imp.cpp
index f52c1053e80594668ec326972fad9bb2c259fa0f..8fc27bd94c3f7568640cce4930fe40ba6af195ac 100644
--- a/xfa/fxfa/parser/xfa_document_datadescription_imp.cpp
+++ b/xfa/fxfa/parser/xfa_document_datadescription_imp.cpp
@@ -68,7 +68,7 @@ CXFA_Node* XFA_DataDescription_MaybeCreateDataNode(
     XFA_ELEMENT eNodeType,
     const CFX_WideString& wsName) {
   if (!pDataParent) {
-    return NULL;
+    return nullptr;
   }
   CXFA_Node* pParentDDNode = pDataParent->GetDataDescriptionNode();
   if (!pParentDDNode) {
@@ -118,6 +118,6 @@ CXFA_Node* XFA_DataDescription_MaybeCreateDataNode(
       pDataNode->SetFlag(XFA_NODEFLAG_Initialized, false);
       return pDataNode;
     }
-    return NULL;
+    return nullptr;
   }
 }