From f24358179685d9ecbc897543488ad56fa9e3a485 Mon Sep 17 00:00:00 2001
From: Neil <nyamatongwe@gmail.com>
Date: Wed, 29 Jul 2020 08:22:22 +1000
Subject: Backport: Use dynamic_cast for SurfaceGDI::Copy as it will fail
 better if a mistake made.

Backport of changeset 8464:73514a371867.
---
 win32/PlatWin.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/win32/PlatWin.cxx b/win32/PlatWin.cxx
index 6cfb02328..b595308d4 100644
--- a/win32/PlatWin.cxx
+++ b/win32/PlatWin.cxx
@@ -982,7 +982,7 @@ void SurfaceGDI::Copy(PRectangle rc, Point from, Surface &surfaceSource) {
 	::BitBlt(hdc,
 		static_cast<int>(rc.left), static_cast<int>(rc.top),
 		static_cast<int>(rc.Width()), static_cast<int>(rc.Height()),
-		static_cast<SurfaceGDI &>(surfaceSource).hdc,
+		dynamic_cast<SurfaceGDI &>(surfaceSource).hdc,
 		static_cast<int>(from.x), static_cast<int>(from.y), SRCCOPY);
 }
 
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