| Index: fpdfsdk/pdfwindow/PWL_Caret.h | 
| diff --git a/fpdfsdk/pdfwindow/PWL_Caret.h b/fpdfsdk/pdfwindow/PWL_Caret.h | 
| index a7cf1d4c05049ca3f6e540424aa8b60710717dd3..0f002a2b4aec36e22e0d4ae9b545a26d1a4c6a69 100644 | 
| --- a/fpdfsdk/pdfwindow/PWL_Caret.h | 
| +++ b/fpdfsdk/pdfwindow/PWL_Caret.h | 
| @@ -28,7 +28,7 @@ class CPWL_Caret : public CPWL_Wnd { | 
| void GetThisAppearanceStream(CFX_ByteTextBuf& sAppStream) override; | 
| void DrawThisAppearance(CFX_RenderDevice* pDevice, | 
| CFX_Matrix* pUser2Device) override; | 
| -  void InvalidateRect(CFX_FloatRect* pRect = NULL) override; | 
| +  void InvalidateRect(CFX_FloatRect* pRect = nullptr) override; | 
| void SetVisible(FX_BOOL bVisible) override {} | 
| void TimerProc() override; | 
|  | 
|  |