SDL: You should call present when using a software renderer as well.

From 581d1cab257a14cd235df2192f012abb0d4e36e0 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Mon, 11 Dec 2023 08:43:31 -0800
Subject: [PATCH] You should call present when using a software renderer as
 well.

Fixes https://github.com/libsdl-org/SDL/issues/8676
---
 test/testdrawchessboard.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test/testdrawchessboard.c b/test/testdrawchessboard.c
index e4c9a882d12c..e067c3299535 100644
--- a/test/testdrawchessboard.c
+++ b/test/testdrawchessboard.c
@@ -57,6 +57,7 @@ static void DrawChessBoard(void)
             }
         }
     }
+    SDL_RenderPresent(renderer);
 }
 
 static void loop(void)