Index: src/ch/RecentDlg.h
===================================================================
diff -u -N -r8f15ad1d2f65340f4f5a30bc95f40a12b0b7dd66 -r8068e0c351055554340ac9755d1bc846893bf2b8
--- src/ch/RecentDlg.h	(.../RecentDlg.h)	(revision 8f15ad1d2f65340f4f5a30bc95f40a12b0b7dd66)
+++ src/ch/RecentDlg.h	(.../RecentDlg.h)	(revision 8068e0c351055554340ac9755d1bc846893bf2b8)
@@ -26,7 +26,7 @@
 {
 // Construction
 public:
-	explicit CRecentDlg(CWnd* pParent = NULL);   // standard constructor
+	explicit CRecentDlg(CWnd* pParent = nullptr);   // standard constructor
 
 protected:
 	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support