SDL-1.2: testloadso: Actually return an error if one occurs

SDL Commits
1 
From 561dff34469f365d11db6cdc8f283fda6cd320a1 Mon Sep 17 00:00:00 2001
From: David Gow <[EMAIL REDACTED]>
Date: Sun, 20 Jun 2021 17:01:10 +0800
Subject: [PATCH] testloadso: Actually return an error if one occurs

cherry-picked from https://github.com/libsdl-org/sdl12-compat/commit/d7ce2ec90fc2482c3e60c1c84bc59c864805450c
---
 test/testloadso.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/testloadso.c b/test/testloadso.c
index 39c14c69f..802a50814 100644
--- a/test/testloadso.c
+++ b/test/testloadso.c
@@ -65,7 +65,7 @@ int main(int argc, char *argv[])
 		SDL_UnloadObject(lib);
 	}
 	SDL_Quit();
-	return(0);
+	return retval;
 }