SDL: testver: don't allow any arguments

SDL Commits
#1 
From 4d86a83fa9a1677697a3538481384dc9b5083216 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Fri, 17 Mar 2023 01:01:28 +0100
Subject: [PATCH] testver: don't allow any arguments

---
 test/testver.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/test/testver.c b/test/testver.c
index 060fbfdf4134..313ea8c8fe05 100644
--- a/test/testver.c
+++ b/test/testver.c
@@ -25,6 +25,11 @@ int main(int argc, char *argv[])
     /* Enable standard application logging */
     SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
 
+    if (argc > 1) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "USAGE: %s", argv[0]);
+        return 1;
+    }
+
 #if SDL_VERSION_ATLEAST(3, 0, 0)
     SDL_Log("Compiled with SDL 3.0 or newer\n");
 #else