Index: src/ch/FeedbackFileErrorDlg.h
===================================================================
diff -u -N -ra27d1acf1bda3c25b6dcce0d0eb0278009ce63ae -r8068e0c351055554340ac9755d1bc846893bf2b8
--- src/ch/FeedbackFileErrorDlg.h	(.../FeedbackFileErrorDlg.h)	(revision a27d1acf1bda3c25b6dcce0d0eb0278009ce63ae)
+++ src/ch/FeedbackFileErrorDlg.h	(.../FeedbackFileErrorDlg.h)	(revision 8068e0c351055554340ac9755d1bc846893bf2b8)
@@ -25,7 +25,7 @@
 	DECLARE_DYNAMIC(CFeedbackFileErrorDlg)
 
 public:
-	CFeedbackFileErrorDlg(const wchar_t* pszSrcPath, const wchar_t* pszDstPath, unsigned long ulSysError, CWnd* pParent = NULL);   // standard constructor
+	CFeedbackFileErrorDlg(const wchar_t* pszSrcPath, const wchar_t* pszDstPath, unsigned long ulSysError, CWnd* pParent = nullptr);   // standard constructor
 	virtual ~CFeedbackFileErrorDlg();
 
 	afx_msg void OnBnClickedRetryButton();